How to solve the phone text message being bombed? Is it illegal?

If you are harassed by phone messages, you can call the police. Sending obscene, insulting, threatening or other information for many times, which interferes with the normal life of others, is a violation of the Law on Public Security Administration Punishment, and can be detained for up to five days or fined up to 500 yuan; If the circumstances are serious, they shall be detained for not less than five days but not more than ten days, and may also be fined not more than 500 yuan.