User manual

62
20 Troubleshooting �����������������������
Before contacting the service center, follow the instructions
below:
• You are advised to fully charge (
) the battery for optimal
operation.
• Avoid storing large amounts of data in your phone as this
may affect its performance.
• Use Factory reset and the upgrade tool to perform phone
formatting or software upgrading. ALL Users 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 before doing
formatting and upgrading.
Carry out the following checks:
My phone has not responded for several minutes
• Restart your phone by pressing and holding the End/
Power key.
My phone turns off by itself
• Check that your screen is locked when you are not using
your phone, and make sure the End/Power key is not mis-
contacted due to unlocked screen.
• Check the battery charge level.