User manual

Troubleshooting ..........................

Before contacting the service center you are advised to follow the instructions

below:

• You are advised to fully charge the battery for optimal operation.

• Avoid storing large amounts of data on your phone as this may affect its

performance.

• Use the FOTA (Firmware Over The Air) Upgrade tool to update your phone's

software. To access Updates, touch the Application tab from the Home

screen, then select Updates or touch Settings\About phone\Updates.

Touch

and the phone will search for the latest software. If you want to

update the system, touch the

button, and when that’s finished, touch

to complete the upgrade. Now your phone will have the latest version of the

software. You should turn on data connection or Wi-Fi before searching for

updates. Auto-check settings are also available. If you have chosen auto-

check, when the system discovers the new version, a dialog will pop up to

choose download or ignore, the notification will also appear in status bar.

Don't change your default storage location while FOTA is downloading or

updating to avoid errors in locating the correct update packages.

• Use Factory data reset and Mobile Upgrade tool to perform phone

formatting or software upgrading (to reset factory data, hold down the Power

key and the Volume up key at the same time when powered off). ALL User

phone data: contacts, photos, messages and files, downloaded applications

will be lost permanently. It is strongly advised to fully backup the phone data

and profile via Smart Suite before doing formatting and upgrading.

• Please pay attention that after Factory data reset is performed you may

be requested to enter Google account credentials* that were used on this

device before Factory reset. Otherwise you will not be able to use the device.

If you don’t remember your Google account credentials please complete

Google account recovery procedure. In case you don’t succeed in it - please

apply to authorized repair center, but remember that it will not be regarded

as warranty case.

* Applicable for Android OS versions starting from 5.1.

and carry out the following checks: