Download Android Jelly Bean 4.2.2 stock firmware for Lenovo P780 smartphone from here or here. Download previous firmware version from here. Download another Lenovo firmware from here.
Archive name: P780_VIBEUI_V2.0_1439_7.10.1_DEV_P_N_DT_Fix
Archive file size: 586 MB
Firmware: Android Jelly Bean 4.2.2 stock firmware
Model: Lenovo P780 smartphone
Platform: Mediatek MT6589
project: prada