9
Installing a SIM-card and memory card
Install the SIM card (nanoSIM format) provided by the mobile operator and, if
necessary, a microSD card.
1. Remove the tray that has SIM
and microSD cards installed. For
removing SIM tray use SIM
extractor tool
2. Insert the SIM card and, if
necessary, a microSD card.
Attention!
It is possible to use either two SIM
cards (nanoSIM) or one SIM card and microSD
card at the same time. Do not insert the
memory card into the SIM card slot. If the
memory card is stuck in the SIM card slot,
contact the authorized Sigma mobile service
center for safe removal. Be careful not to lose your SIM card and do not let others use it. Sigma mobile is
not liable for any damage or inconvenience caused by the loss or theft of the cards.
3. Place the tray in the appropriate slot and secure it.
Your device accepts memory cards with maximum capacities of 128 GB.
Depending on the memory card manufacturer and type, some memory cards
may not be compatible with your device.
Some memory cards may not be fully compatible with the device. Using an
incompatible card may damage the device or the memory card, or corrupt the
data stored in it.
Use caution to insert the memory card right-side up.
The device supports the FAT and the exFAT file systems for memory cards. When
inserting a card formatted in a different file system, the device asks to reformat
the memory card.
Frequent writing and erasing of data shortens the lifespan of memory cards.
Attention
! Take a look at the two ways of using the memory card that will be
proposed, after turning on the smartphone. Choose the best suited variant.
MAIN TECHNIQUES
Touchscreen usage
It is recommended to use fingers when you use the touchscreen.
Attention!
Do not allow the touchscreen to come into contact with other electrical devices. Electrostatic
discharges can cause the touchscreen to malfunction. To avoid damaging the touchscreen, do not tap it with
anything sharp or apply excessive pressure to it with your fingertips. The device may not recognize touch inputs
close to the edges of the screen, which are outside of the touch input area. Leaving the touchscreen idle for