[mulazee]

Tecno f1 have flash the phone with firmware more three times still unfortunately app has stop also everything on the phone still remains nothing deleted can anybody help me for solving this problem.

[nadjtech]

Go to the recovery and do a hard reset.

Sent from my SM-G930F using Hovatek Mobile

[xerxes]

Tecno f1 have flash the phone with firmware more three times still unfortunately app has stop also everything on the phone still remains nothing deleted can anybody help me for solving this problem.

eMMC chip is bad, it needs repair or replacement.