manualshive.com logo in svg

E28 R2821, User Manual

Share
Download
E28 R2821 User Manual Download Page 75

 75 

                  MP4 (MPEG4+AAC), QCIF 

                  MP4 (MPEG4+AAC), QVGA 

The R2821 PC tool software can be used to download the supported videos and pictures 

to the phone.   

 

R2821 PC tool software is used to download from the PC 

1.  Connect the R2821 with the computer by USB data cable 

2. Select 

【

Menu

】

->

【

Tools & Setup

】

->

【

Connect PC

】

  from R2821 to wait for R2821 

to set up connection with PC.. 

3. 

Activate the R2821 PC tool software from PC to connect with the R2821. Press 

【

Gallery

】

  to copy the video file to the phone or T-Flash. 

 

Card writer is used to write the file to T-Flash directly 

If you have a T-Flash card writer, there is no need to install other software. The card 

writer can be used to copy the music files to the “sights” directory of the T-Flash 

from PC directly, and then T-Flash is inserted into the phone.

 

 

Note: if some improper files are copied to the directory, it will cause the video 

player and the gallery software is not available. 

 

 

 

 

 

 

 

 

 

 

 

 

 

11 Troubleshooting 

 

Summary of Contents for R2821

Page 1: ... 1 R2821 USER MANUAL ...

Page 2: ...best but will not guarantee to eliminate this difference completely At the same time E28 reserves the rights to revise or modify the manual without prior notification or replacement with updated version The mobile phones accessories and manual may vary depending on the release areas and time The copyright of this manual is reserved by E28 Without prior written permission of E28 all or part of the ...

Page 3: ... 3 ...

Page 4: ... 4 ...

Page 5: ...ies randomly Do not put the battery into fire water or contact it with metal conductor to prevent explosion or short circuit Use certificated power supply and charger Use the earphone or hands free device when driving to prevent accident Comply with local rule and regulation about the usage of mobile phone strictly Note that the mobile phone may interfere with computer TV radio and other electroni...

Page 6: ... does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to ...

Page 7: ...dar 37 4 1 VIEW CALENDAR 38 4 2 NEW EVENT 39 5 Application 40 5 1 EMAIL 41 5 1 1 Setup email account 41 5 1 2 Mailbox folder 43 5 1 3 Read email 43 5 1 4 Send email 44 5 1 5 Delete email 44 5 2 MEMO 45 5 3 DICTIONARY 45 5 4 WORLD CLOCK 45 5 5 ALARM CLOCK 46 5 6 CALCULATOR 47 5 7 JAVA 47 6 Sight Sound 48 6 1 PHOTO CAMERA 49 6 1 1 Take photos 49 6 1 2 Review Photo 50 6 1 3 Edit Photo 51 6 2 VIDEO CA...

Page 8: ...Power On Off 63 8 5 4 Security 63 8 5 5 Calibrate Screen 63 8 5 6 Power Save Mode 64 8 5 7 Screen Brightness 64 8 5 8 Backlight Auto Lock 64 8 5 9 English SC Input 64 8 5 10 Reset Factory Settings 64 8 5 11 User Information 64 8 6 WLAN 64 8 6 1 WLAN setting 64 8 6 2 WLAN Connect Status 65 8 6 3 VoIP setting 65 8 7 CALLS 66 8 7 1 Network 66 8 7 2 Incoming Calls 66 8 7 3 Outgoing Calls 66 8 8 MESSAG...

Page 9: ...HOW TO TURN ON OR OFF THE ANTENNA 73 10 5HOW TO TAKE PHOTOS AND SET AS WALLPAPER 73 10 6HOW TO CHANGE THE WALLPAPER 74 10 7HOW TO SEND A MMS 74 10 8HOW TO ACCESS THE INTERNET 74 10 9HOW TO DOWNLOAD AND PLAY MP3 74 10 10 HOW TO CHANGE THE RING TONES 74 10 11 HOW TO DOWNLOAD VIDEOS AND PICTURES 74 11 Troubleshooting 75 ...

Page 10: ...ew from the mobile operator if the old 5V SIM card is used Most of mobile operators will replace it with a new without change of the phone number 2 Do not bend or scratch on SIM card or contact it with electrostatic dust or water Lanyard Anchor Speaker Power Screen Lock Stylus Camera End Cancal WLAN Side LED Receiver GSM Side LED Display Touch Screen Send Mirror Call Log Up Down Key Earphone Jack ...

Page 11: ... 2 DO NOT contact the battery with conductor to prevent damage from short circuit 3 DO NOT use battery which is not from original manufacturers or is not specified model Power off the mobile phone before removing the battery and then take out the SIM card Take out the SIM card Power off the mobile phone before removing the battery and insert SIM card whose side with the cut off corner should be up...

Page 12: ...12 ...

Page 13: ...and turn the cover of T Flash over before taking out the T Flash Don t pull out it by force Take out the T Flash card Install the T Flash card Power off the mobile phone before removing the battery and then insert the T Flash card Power off the mobile phone before removing the battery pull down and turn over the cover and then take out the T Flash ...

Page 14: ... bottom of the mobile phone 2 Plug the power supply of the charger into the socket of the main power supply 3 The battery meter will flash when charging It will be normal if the charger is hot for the long charge time 4 The indicator LED will turn into yellow when the battery is full 5 Switch the power supply off before the mobile phone is disconnected from the charger 6 If the battery is discharg...

Page 15: ...charged fully for low current supply or it will shorten the life of the battery so the USB charger should be used as few as possible unless it is necessary 1 6 Idle Screen The idle screen is the start screen of the mobile from which to enter into various applications Press key in face of the mobile phone to return to the main screen in any application Status icons The state bar is at the top and b...

Page 16: ...ttery is empty With GSM service no GPRS service With GSM service GPRS available Roaming Call active Call on hold Mute model no ringing or vibrating Ringing mode Vibrating ringing mode Vibrating only mode Vibrating before Ringing With alert No alert ...

Page 17: ...mber key on idle screen Operating on pull down menu you can 1 Move up in menu item by pushing Up down key upward 2 Move down in menu item by pushing Up down key downward 3 Return to upper level menus by pressing C key Screen lock unlock key usage To prevent from pressing keyboard or screen uninentionally press Screen Lock key to lock keypad and touch screen Press Screen Lock key again to unlock Yo...

Page 18: ...xels TFT LCD 260 thousand colors Touch screen Camera CMOS 2 million pixels maximum 4x digit zoom Ring tone Midi MP3 Port standard Mini USB port support USB charging Size 106 5x48 5x16 5mm Weight about 100gramme include standard battery Phone factor Candy bar Antenna internal Battery capacity 980mAH Standby time 75 130 hours Vary with network state Talking time 120 300 minutes Vary with network sta...

Page 19: ...customization ring tone customizable by individual contact or by category Max Length of telephone number in contacts 32 digits Max Length of telephone number in dial pad 50 digit Ring tone mute by single key press Photo dialing 4groupsx9person group Auto dialed phone number recall Short Messages SMS Group sending Max 100 contacts Concatenated messages 10piecex140bytes piece Multi Media Messages MM...

Page 20: ...rgency call number112 Audio recording AMR maximum capacity 1 hour Audio playback MP3 AMR MIDI Video recording 3GP H 263 AMR QCIF Video playback 3GP H 263 AMR QCIF MP4 MPEG4 AAC QCIF MP4 MPEG4 AAC QVGA Photo style JPG full color sepia black white 240 240 320 240 480x480 640x480 1280 960 1600 1200 Picture format supported JPG GIF GIFa PNG MP3 format supported 64K 128K 192K CBR VBR Dynamic display ef...

Page 21: ...t information such as mobile phone number home phone number business phone number and so on Furthermore the photo and ring tone can be set individually for each contact Contacts can be sorted by groups or categories for easy management Note Above capacity is the recommended upper limit The large capacity will affect the use performance to some extent 2 1 Telephone functions Caution You can only di...

Page 22: ...y When the first several digits are matched with that dialed the mobile phone will make up the rest digits automatically If the filled result is not what you want you can just continue to input the rest digits and the auto filled digits will disappear 3 Click Dial button to dial the phone number shown in phone number box If the number Contacts Call log Long click this key to insert p which followe...

Page 23: ...l need operator service Press VOIP to make VOIP call Please refer to section 8 6 WLAN VOIP settings to configure your VOIP settings 4 You can also input telephone number by keypad and dial out by send key 5 Press End on screen or press End key to end the call 2 1 2 Photo dial Click at dial pad to access photo dial Photo dial makes the phone dialing easier and more directly You can simply press the...

Page 24: ...roup contains 9 photo dial contacts 2 1 3 Quick dial numbers in SIM card You can dial the number stored in SIM card by storage index on dial pad Input the storage index of the contact of your SIM card and then click button the corresponding phone number will be shown in the number box Click Dial button to dial out 2 1 4 Answer Call Caller ID will be matched during an incoming call The name and pho...

Page 25: ... the call 2 2 Contacts R2821 provides contact book with super high capacity Each contact is a big social database which contains name mobile phone number home phone number business phone number FAX number address birthday etc R2821 contact book can be managed by groups and categories Contacts can be sorted into categories such as family friends colleague etc And you can define groups as well R2821...

Page 26: ... a new contact on contact list screen 6 Each contact contains name mobile number business phone number home phone number and FAX number and multimedia data such as photo and ring tone Type of contact Search the contact Contacts Select view manner View by List View by Thumb and sort manner View by Last Name View by First Name Number of contacts Family name index Go back to previous screen ...

Page 27: ... card Phone Delete Press to view events related to this contact and add new event for this contact Press to send Vcard of this contact to other by SMS A pop up menu will come up while hold a contact for a period of time by stylus 9 It has following menu items View details Dial Number Prepend Dial Send SMS and Send MMS ...

Page 28: ...rd contact because of short of storage memory while contact stored in mobile phone contains much more information Therefore the device will ask user to selectively store information while copy contact from mobile phone to SIM card since there s no enough storage space On the contrary user need to specify which item in mobile contact will store the information copied from SIM card 2 2 3 Search cont...

Page 29: ... 2 5 Groups and Categories Categories are usually used to category management For instance you can quickly search contact by selecting to display only some category or specify different ring tone for different category Groups are usually used to send group message SMS MMS included One contact can only be of a category but it can be of different groups 2 2 6 Manage Categories Select Manage Categori...

Page 30: ...put category name Select ring tone of the category Select led alert color of incoming call of the category Whether or not to private the category 2 2 7 Manage groups Select Manage Groups from menu on the contact list screen 6 to enter into groups management screen as following figure ...

Page 31: ...ress New Group to add new group 15 In the new group you need Input group name Select the type of the group SMS MMS E mail Press to select members of groups from the contacts Whether or not to private the group ...

Page 32: ...y Date View by Name View by Call Meters A pop up menu will come up while hold a contact for a period of time by stylus 17 It has following menu items View details Dial Number Prepend Dial Send Message Save Number to and Delete Record Press a record to view details View by Date View by Name View by Call Meters Click pull down box to select the type of record All calls Outgoing Calls Answered Calls ...

Page 33: ...ge SMS AND MMS SMS Short Message Service common Short Message Service is a basic simple text message service of GSM network and is sent directly from one side to the other by point to point mode MMS Multi Media Messaging Service Multi Media Messaging Service is a great evolution of existed SMS and can be used to edit and real time send the picture audio and text information to implement the inform...

Page 34: ...lete folders Setup set message function Press SMS to enter into the SMS editing screen Press MMS to enter into the MMS editing screen Click the pull down box to switch the mailboxes Inbox store the messages received Outbox store the messages not sent or failed to send Drafts store the unfinished messages temporarily Sent items store messages already sent SIM card store messages in SIM card View Al...

Page 35: ...sender Press to save the number electron business card of the sender to Contracts Press Reply to reply the sender by SMS 3 3 Send message Menu Message then press SMS or MMS to add a new message If there is only text in the message it should be sent as an SMS if pictures or music is inserted Menu Forward Message forward the message to other contacts Move message Delete message Save to the Contacts ...

Page 36: ...ess to insert Image take photo insert Video capture video new drawing Press to insert sounds insert recording Press Recipients to input the number of a recipient Insert Sound Insert Recording Insert Slide Next Slide Previous Slide Delete Slide Play Insert Quick Message Insert Image Take photo Insert Video Capture Video New Drawing 带格式的 字体 默认 Arial ...

Page 37: ... Press the top and right corner of screen 5 to retrieve it by the family name 5 3 4 Delete message Select the delete message from the menu of screen 1 4 Calendar In calendar you can arrange your daily schedule to make the trivial affairs easier Menu Calendar Select Contact Select Group ...

Page 38: ...ct View Month View Week Press to search your event You can search the event by subjection location notes or attendees Menu Delete Month s Events Delete all Events Setup Set the week begins on day begins at retention period 带格式的 字体 中文 黑体 加粗 ...

Page 39: ...n 1 You can set Subject Location Note All day event or not The begin and end time of the event Whether set recurrence Free Busy Tentative Out of office Important Business Personnel Vacation Must attend Travel Required Private or not Press to set the prompt time of the event 4 ...

Page 40: ...ess to add the attendees of the event 5 Press to set the remind mode of the event 6 5 Application R2821 builds in such applications as eMail Memo World Clock Alarm Clock Calculator and Java Menu Application ...

Page 41: ...41 1 5 1 eMail Menu Application eMail 2 5 1 1 Setup email account Press setup or a email account for initial use to enter email account setup ...

Page 42: ...mail by GPRS or CSD eMail Address eMail Account Account password Configure POP3 Server Whether to retrieve only email headed The maximum Mail size Whether to save on server Configure SMTP server Cell broadcast on or off View quick message or set new quick message Set the signature in Emails ...

Page 43: ...43 5 1 2 Mailbox folder 4 Emails to be read Emails already read 5 1 3 Read email Press email record in the inbox to read this email directly 5 Press Reply to respond email to the sender ...

Page 44: ...input subject and message Press Recipient to input the recipient s address 6 Press Contacts to select email address of contract to Recipient edit box or click To CC BCC edit box to input the email address 5 1 5 Delete email Select delete emails from the menu of inbox screen 4 7 ...

Page 45: ...ese English dictionary with super high capacity which may help you in time 5 4 World Clock R2821 builds in world clock to facilitate to contact with remote friends and business partners Menu Application World Clock Menu View All Memos Notes Only Drawings Only Voice Recording Only Copy to T Flash Copy the note to TF card while the original one remains Move to T Flash Move the note to TF card while ...

Page 46: ...ity will be displayed at the same time 5 5 Alarm Clock Three sets of alarm clock are allowed to set and each of which can present its own repetition cycle Menu Application Alarm Clock 10 Press pull down list to select world cities Menu Turn All On Turn All Off ...

Page 47: ... 6 Calculator Menu Application Calculator 12 5 7 Java Menu Application Java R2821 can run the Java program You can set Whether enable alarm clock Alarm time Repeat cycle Alert music Whether vibrate Snooze time ...

Page 48: ...camera function so the exciting moments can be recorded at any time and everywhere and the photos can be saved to the phone or the T Flash Furthermore it can be set as wallpaper or a face picture with incoming call The photos also can be sent to your relatives and friends by MMS R2821 supports various picture formats such as JPG PNG which can be set as the wallpaper to present your unique personal...

Page 49: ...ith incoming call 6 1 1 Take photos Menu Sight Sound Photo Camera to activate the digital camera 2 Press to select the resolution of the photos Press to digitalize the zooming Press to adjust the lightness Press to set the capturing delay time 0 5 10 15 seconds Press Capture to take photos Menu Show Information Mode Indoor Outdoor Evening Effects Full Color Sepia Black White Flicker Control 50 Her...

Page 50: ...he size of the photo For the resolution 240 240 up to four times of zooming can be achieved For the resolution 1600 1200 the digital zooming will not take into effect 6 1 2 Review Photo 3 Press to edit the photo Press to set it as the face picture of the incoming call Press to send it by MMS Menu Original size Set as Wallpaper Set the picture as wallpaper Copy to T Flash phone Move to T Flash phon...

Page 51: ... glasses and mask to the picture Press to select the color of drawing Press to view the entire picture and then return by pressing the photo 6 2 Video Camera R2821 can record wonderful video clips and save them to the phone or T Flash Menu Sight Sound Video Camera ...

Page 52: ...wer right corner of the screen to save it to the Phone T Flash 6 3 MP3 player R2821 not only provides MP3 MIDI and AMR music playing function but also supports various dynamic playing effects which will make you enjoy wonderful music as much as you like in the spare time Menu Sight Sound MP3 player 6 3 1 Play Music 6 Menu Switch Display Set as Ring Tone The player will display the name the current...

Page 53: ...s to turn down the volume 6 3 2 Play list Press View Play List to list all music in the phone or T Flash on the music playing screen 6 The music with a tick is that in the play list Press some music to add into or delete them from the play list Menu 7 Select All Unselect All Copy to T Flash Move to T Flash Delete Song Press to select Hide Unselected Show All Click the pull down box to select the m...

Page 54: ... Press Start Slide Show to display all the pictures in the gallery automatically and set the switching speed of the slides and the background music Press the picture to stop playing during the playing 6 5 Play Video R2821 can play MPEG4 with postfix MP4 or H 263 with postfix 3GP video files and play with horizontal full screen to achieve the striking visual effects Press video clips to play direct...

Page 55: ...he fun brought by the wireless communications as much as you like Menu Internet Click screen to switch between horizontal and vertical full screen playing mode Return Stop Play Pause Menu Send by MMS Delete Move to the T Flash Phone Copy to the T Flash Phone Privacy On Off Playing schedule ...

Page 56: ...nctions not only need you to order the data service from ISP but also set the internet settings correctly refer to Internet settings for more details Related knowledge GPRS connection GPRS is the abbreviation of General Packet Ratio Service which is upgraded from the GSM so it is referred to as the 2 5G mobile communication technology GPRS provides such features as always online charging by meters...

Page 57: ...ith STK function is inserted this function will be presented The concrete VAS application varies depending on the service operator 7 2 Browser Menu Internet Browser 3 Menu Refresh Page Refresh the current page Set Home Page Bookmark Save URL Open URL Saved Pages Save page Open page Clear Cache memory Clear data memory Setup ...

Page 58: ...okmarks The websites frequently access can be saved to bookmarks so as to facilitate the network operation 7 4Web History Menu Internet Web History The recent logging records such as website address logging time can be viewed Press a record to view the detailed information of each item 7 5 Saved Pages Menu Internet Saved Pages Some web sites can be saved to browse offline 7 6 Data Meters Menu Inte...

Page 59: ...eniently or individualize the phone Menu Tools Setup 1 Memory Usage View the use status of phone memory and T Flash card memory Connect PC Connect the phone to a computer by the USB cable MODEM Take the phone as a modem to access to wireless Internet Alerts Set the alert of the incoming call SMS event etc ...

Page 60: ...e memory and T flash memory card For this function T Flash card can be formatted by pressing Format T Flash in the menu of the memory usage screen 8 2Connect PC Menu Tools Setup Connect PC 2 Connect the phone to the computer by USB cable to complete material synchronization picture video clips and music transmission Tips The PC must be installed with R2821 PC tool software R2821 PC tool software i...

Page 61: ...em R2821 can be used as a wireless modem USB cable can be used to connect the R2821 with the computer and then access the wireless network by GPRS CSD 3 4 5 Tips The PC must be installed with R2821 PC tool software and the modem driver ...

Page 62: ... and sounds auto power on off security power save mode screen brightness backlight auto lock language reset factory settings user information an be set 6 8 5 1 Date and Time In the date and time settings following function can be implemented Select the display order of year month and day set the date set the time set the time format am pm 24 whether daylight savings Set the first day of week Set t...

Page 63: ...assword SIM PIN SIM PIN2 Lock Code Privacy Code Caution SIM PIN code can protect your SIM card from being stolen When the PIN code protection is activated you will be asked to enter PIN code every time the mobile phone is power on SIM PIN2 code can protect some important settings from changing arbitrarily If the PIN is entered incorrectly for three times successively SIM card will be locked and ca...

Page 64: ...or German can be selected from the pull down menu to set the type of language the mobile phone displays 8 5 10 Reset Factory Settings All options are reset to original factory settings once this item is selected After the factory settings are restored the mobile phone will be power off automatically and all information the mobile phone saved will be cleared 8 5 11 User Information Your name and co...

Page 65: ...ction status of WLAN can be viewed 9 8 6 3 VoIP setting The default VOIP settings can be implemented and new VOIP settings can be added Tips For the material needed for concrete VOIP setting you need to request for it from specific operators ...

Page 66: ...l Divert when it is inconvenient for you to answer a call it can be diverted to another phone You can divert all of your voice calls data calls and fax calls to the number you choose divert when unavailable when busy and when no response cancel all divert Call Barring Bar all incoming calls when roaming Cancel All Barring Change Passwords Caution Auto answer settings will become effect only when t...

Page 67: ... voice mail center number and then press Done to store the number Call Barring Bar all outgoing calls international calls int l calls except to home Cancel All Barring Change Passwords 8 8 Message Menu Tools Setup Message 8 8 1 SMS In the SMS settings you can set the items as follows Service Center Number Query from the mobile SP Save incoming message outgoing message to SIM card memory phone memo...

Page 68: ...the Message screen then press the signature box to input the signature 8 9 Internet Menu Tools Setup Internet In the internet settings you can do the following settings Connection setup connection setup is the base of all the network service including WAP network access MMS and etc functions which all depend on the correct connection setup R2821 can provide the automatic configuration function and...

Page 69: ...ion You can write on the screen directly or use the stimulant soft keyboard on the screen to input The input area will automatically pop up while required Handwriting input mode Spelling input mode Western letter input mode Symbol input mode Hide the keyboard Spacebar Backspace Enter Handwriting input mode ...

Page 70: ...pelling of the Chinese Character and corresponding Chinese Character will be displayed in the bar Then press needed character to finish it I Western letter input mode The symbol highlighted by the blue circle denotes the status of switching between uppercase and lowercase ab denote lowercase Ab denotes that the uppercase lock is effective only to one letter Namely after an uppercase western letter...

Page 71: ...de among Spelling ABC Eng 123 stroke sequence is used to input punctuations English input Intelligent English Eng input mode Switch to Eng input mode by pressing key then press the corresponding key of the letter and system will automatically chooses the most matching words according to the context which can be picked by pushing downwards right pressing the Up down key or the number key Press 1 to...

Page 72: ...bc Abc ABC Number input Switch to 123 input mode by pressing key then press the corresponding key of the number System will select the matching digits automatically Symbol input Press key to switch to symbol input mode and choose the corresponding symbol by the Up down key ...

Page 73: ...directly and then press to dial corresponding number 10 2 How to set time and date Menu Tools Setup Device Date and Time 10 3 How to set alarm Menu Application Alarm Clock 10 4 How to turn on or off the antenna Press the network name in the bottom center of the idle screen to turn on or off the antenna Press the network signal in the top left corner to enable or disable phone 10 5 How to take phot...

Page 74: ...oad from PC 1 Connect R2821 with PC by USB data cable 2 Select Menu Tools Setup Connect PC to wait R2821 PC to set up the connection 3 Activate the R2821 PC tool software from the PC and connect it with R2821 Press Music button to copy the music files to phone or T Flash card Card writer is used to write the file to T Flash directly If you have a T Flash card writer there is no need to install oth...

Page 75: ... the R2821 PC tool software from PC to connect with the R2821 Press Gallery to copy the video file to the phone or T Flash Card writer is used to write the file to T Flash directly If you have a T Flash card writer there is no need to install other software The card writer can be used to copy the music files to the sights directory of the T Flash from PC directly and then T Flash is inserted into ...

Page 76: ...ge indicator appears Cannot power on Poor battery contact Take out the battery clean the dirt in the contact point and reinstall it The battery is fully discharged and needs to be reactivated Plug in the charger and wait for about 10 minutes until the charge indicator appears Then go on charging till the battery is full Cannot charge Poor battery contact Take out the battery clean the dirt in the ...

Page 77: ...r on the mobile phone The phone is power off suddenly The battery looses Reinstall the battery The power of the battery is not enough Recharge the battery for 12 hours ignoring the fully charged signal The mobile phone is used too frequent Use it as needed Press the button unconsciously Keep your mobile phone carefully and avoid pressing the button The battery is aging Replace a new one The standb...

Page 78: ...ugh or network fails Move to a wide area and retry MMS is set incorrectly Contact your network operator and get correct settings Data service is not run Apply for GPRS service from your network operator Storage space is full Delete part of MMS The mobile phone of the receiver fails to support MMS or is set incorrectly Inform the receiver to take the corresponding measure Network overloads Send it ...

Page 79: ...Owe or pre paid has expired or been used out Contact your network service provider and recharge it Cannot access network Signal is too weak or there is no signal Network coverage is not enough or network fails Move to a wide area and retry Fierce vibration It may cause this phenomenon if the battery is recharged when it is nearly depleted Pull out the charger and take out the battery reinstall the...

Reviews:

No comments

Brands by name

Popular brands

Load more brands