recommended that you back up important data to a storage device before upgrading.
System update consume a large amount of data, you're suggested to use Wi-Fi.
4.
Maintenance
It is important to understand mobile phone maintenance and servicing thoroughly so that
you can use your phone safely and effectively and extend its service life as much as possible.
For details on maintenance and troubleshooting, please refer to "Important Information and
Warranty Card".
This phone uses the Android operating system. To view the phone's version, go to
"
Settings > About phone
".
In "
Settings > About phone > Legal information > Safety information
", you can learn
the safety considerations for this device to help you use it in a safer way.
Help
If you encounter any problems when using your phone, contact your network carrier or
contact vivo after-sales service center. Please enter "
Settings >About phone>
Customer
service>Service Center
" interface to find service hotline.
Support file formats
