Archive name: BBK Vivo X3t 4.2.1 fw
Firmware image: PD1227T_A_1.13.3-update-full.zip
FW version: Android Jelly Bean 4.2.1 stock
Archive file size: 624 MB
Model: BBK Vivo X3t smartphone
Platform: MediaTek MT6589T
Build number: bbk89_cmcc_jb2-user 4.2.1 JOP40D eng.compiler.1388062145 test-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.