do i need to back up my data before i upgrade?

Yes, it is recommended and encouraged to back-up the data on your handset prior to upgrading your software. To back-up the data on your Huawei Mercury handset you must have an SD card installed in your phone. Once you have an SD card installed go to the All Backup application in your Application menu. Select the All Backup icon, click the Backup to SD icon, select/deselect your desired items, and click Backup.

Once you have upgraded the software on your Huawei Mercury, return to the All Backup application, click Restore from SD, select the desired file, select/deselect your desired items, click Restore, select Overwrite (if you want to replace any items on your phone) and click Ok. You will need to restart your phone before the restored data is available.