Download Android Lollipop 5.1 stock firmware for Lenovo A3690 smartphone from here, here or from here. Download another Lenovo firmware from here.
Firmware details
Firmware:1534596 Lenovo A3690 ROM
Image: FN20151112CH_FNCH_A3690_201511
Firmware:1534596 Lenovo A3690 ROM
Image: FN20151112CH_FNCH_A3690_201511
Model: Lenovo A3690 smartphone
Image file size: 562 MB
Platform: Mediatek MT6735M
Project: lcsh6735m_35u_l
Config_version: V1.1.2
Inside archive: firmware + SP_Flash_Tool_exe_xiaominote
Project: lcsh6735m_35u_l
Config_version: V1.1.2
Inside archive: firmware + SP_Flash_Tool_exe_xiaominote
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.
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