What should I do if my new mobile phone Xiaomi sends and receives text messages for more than ten minutes?

Hi! All text messages are delayed? Or a personal number? The former has no way to clean up, and the latter has no way. It's the platform connection. Back up the important data first, then enter the recovery to clear all the data, and don't restore the data temporarily after booting, and see if the problem can be solved. (Backup: Security Center-Backup, backup the data you need. Clear data: off ...