pm uninstall -k --user 0 com.baidu.input pm uninstall -k --user 0 com.duoqin.market pm uninstall -k --user 0 com.mediatek.mtklogger
If you do find a specific firmware file ( .img or .zip ) online and plan to flash it using SP Flash Tool: qin f21 pro rom
on how to find the most stable ROM version for your specific hardware model? pm uninstall -k --user 0 com