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35
properly perform the update process, insert the SD card containing enough free
space and specify it in the system as an
external memory.
If the card is specified as
an
extension of internal memory
, the update will not be possible.
Remember that updates tend to have an expected size counted in hundreds of
megabytes, so we recommend that you carry them out when connected via Wi-Fi.
Updating via the GSM network may contribute to the operator charging for data
downloaded from the Internet.
Please remember that before upgrading, the battery charge level should be
higher than 30%. If it is lower, plug the device to the power grid and charge the
battery
at least
to 30%.
While updating the device might restart on its own a few times. You should not
remove the battery or use any of device features, as this may cause the device to
stop working.
22. Safety remarks
22.1 Troubleshooting
In case of any problems with the device we strongly advice to make a copy of an
important data (contacts, SMS, photos, videos, music etc.) and restart the phone or
restore default factory settings.
If the problem continues, read the following tips and follow the given suggestions
in case of problems with a particular section:
•
MicroSD Memory Card
- Make sure that the microSD memory card is installed
correctly in the correct slot for the microSD cards. If it does not help use another
memory card of appropriate class and capacity.
•
USB
- check the cable, by plugging another device. Check the form of a USB
connection in smartphone settings (shortcut available in screen notifications). If
it doesn't help, use another cable.
•
Bluetooth
- check whether the connection is active and Bluetooth visibility
options are enabled. Make sure that both devices are in Bluetooth connection
range and there are no obstacles between them (interesting fact - some LCDs
absorb magnetic waves). Make sure that the devices have a sufficient amount
of memory to exchange files. Make sure both devices have disabled the
aeroplane mode. It blocks Bluetooth, Wi-Fi, and cellular networks.
•
Internet/Wi-Fi
-
Check if the aeroplane mode is not on, because it disables using
any wireless network functions. Check network range. Check if the function is
activated in the device and the parameters set correctly. Check if the password
to the Wi-Fi network is correct.
•
Sounds
- make sure that the sound in the phone is not muted. Check other
smartphone sound settings. Check if the plug at the end of the cable is
connected correctly to the 3.5 mm minijack socket. Some minijack plugs differ
from each other which also might be a reason. Try another cable or use an
