Mobile phones are deeply troubled by spam messages;

If you use a smart phone, I suggest you install a call firewall software. Rules can be set, spam messages and MMS messages can be automatically intercepted, and short-term calls can prompt whether to join the blacklist ... These problems you mentioned can be completely solved.

I use a mobile phone based on s60v5 platform. For this platform, I can use security housekeeper, 360 mobile guards, Dentsu and other software.