Friends hi, I have my problem I can not solve it. My son has received the "Guest Mode" of the MX4 mobile phone and does not remember the phone password. In this case, we can only use the phone in "Guest Mode". We can not reset the phone's opening password. We can not reset the phone to factory settings. Because I need a password. We do not remember the password. Customer service unfortunately did not solve the problem. When the password is forgotten on Android system devices or wrong password is entered many times, password can be reset by "google account". However, the "flyme system" used by Meizu phones is not available to the user. This is a huge disadvantage for the user. Software developers need to publish an update taking this into account. Please help solve the problem.