Mobile phones always receive harassing text messages, as if infected with a virus?

Cell phones always receive harassing text messages. It's not necessarily a virus.

However, personal mobile phone numbers are likely to be leaked and become the content of information transactions. Circulation in the hands of business people. As a result, all kinds of inexplicable promotion, publicity and other information came to your mobile phone.

Therefore, it will not be effective to restore the factory settings. Unless your mobile phone number is no longer used by information dealers, people with your number will no longer send you spam, or you can change your mobile phone number yourself.

Of course, you can also set up spam blocking.