Hi everyone, I bought a MX4 today 2nd hand. Guy said he did a factory reset. I started the phone, tried to create a flyme account. I was able to create one. But when I wanted to login system said ‘old flyme account should login and logout’. I don’t know how to reach the guy. I did a ‘power+volume-’ clear data but it didn’t help. I want to ‘really’ hard factory reset. I can use adb commands. Can anybody help me? Thanks…