I bought a Lenovo A60 mobile phone and have been texting myself. I secretly send them at night and during the day. The mobile phone itself has no display screen. How to solve it?

It should be a virus or a Trojan horse. Try an anti-virus software for Android on the Internet. If not, restore the factory settings.

The so-called root authority means that the manufacturer prohibits users from doing some operations at the bottom of the system in order to prevent users from accidentally damaging the system.

ROM is equivalent to the file of mobile phone operating system, and the correct ROM can be updated to the mobile phone through recovery mode to upgrade the mobile phone software.