What should the elderly E99 mobile phone do if it often sends messages online automatically?

This is a common situation of shanzhai mobile phones. Malware in mobile phones will deliberately customize certain services to collect users' phone bills, and this function cannot be turned off as long as it is turned on.

In addition, low-end shanzhai mobile phones (including some smart phones) are all systems and software written by hardware, which cannot be changed, that is to say, there is no solution except changing mobile phones. ...

If you don't want to be charged like this, you can give up the cottage phone and replace it with a genuine manufacturer's phone. ...