2. If the mobile phone network connection is normal, it is recommended that your mobile phone upgrade the following systems.

3.MX3 Flyme 3.5.2

Precautions:

1) Users who are already ROOT, or users who have installed security software and fixed the Android signature vulnerability, please be sure to clear the data when upgrading, otherwise they may not be able to ROOT. Clearing the data will cause the loss of personal data such as contacts, please pay attention to synchronous backup;

2) When the firmware is updated from the high version to the low version, the data must be cleared, otherwise it may not be able to boot;

3) MX3 TD users, please don't brush back the firmware whose version number is lower than Flyme OS 3. 1. If you upgrade, you will not be able to boot;

MX3 international edition, upgrading this firmware may cause application data incompatibility;

5) Both MX 3 and MX3 TD can upgrade this firmware;

6) Before upgrading, please back up your personal data through Flyme;

7) Before upgrading, please ensure that the battery charge is greater than 20%;

Upgrade process:

1) Copy the firmware to the mobile phone, and click the firmware in the document that comes with the mobile phone to upgrade it;

2) If it is necessary to clear the data, please check (after checking, system files such as contacts, short messages, emails and third-party programs will be deleted, but user files such as music, photos and videos will not be deleted);

3) When upgrading, please don't turn off your phone. After the upgrade, the phone will start by itself.

4) Go to Settings → About Mobile Phone. If the display system is Flyme OS 3.5.2, the upgrade is successful;