Download Android Jelly Bean 4.2.2 stock firmware for Lenovo A850 smartphone from here or from here. Download another Lenovo firmware from here.
Archive name: Lenovo-A850_140208_Lang_P
Archive file size: 361 MB
Firmware: Android Jelly Bean 4.2.2 stock firmware
Model: Lenovo A850 smartphone
Platform: Mediatek MT6582
Project: aux
Config_version: V1.1.1
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