Disappear after reading the text message?

Malware should be installed. The first method: first close the non-system files with process management (Jinshan Guardian is recommended, with this function) and take out the memory card. You can also enter the program management to delete the bound software. If you don't know which software it is, look at the installation record to see which software you didn't manually install and delete. The second method: you need to crack the mobile phone, write down and end this process with the running software of Kingsoft Security Guard, and delete it with Xplore.