Force upgrade
Step 1.Format the Micro SD card (This operation is optional).
Step 2.Copy the Software: main package to a directory named dload.
Step 3.Copy the entire dload folder (with UPDATE.APP in it) to the root directory of the Micro SD card.
Step 4.Make sure your handset is power off. Insert the Micro SD card into the handset. Press the VOLUME UP and VOLUME DOWN key, and then press the POWER key to power on the phone and enter the Software Upgrade Mode.
Step 5.When the progress bar stop, the phone will restart automatically.
Step 6.Please copy the Software: vendor package UPDATE.APP to a directory named dload. Then Execute Step 2 – Step 5 repeatedly. This step is needed only when the version is upgraded by test member.