Why was there no SMS reminder before, and now there is no SMS reminder for incoming calls?

If the call reminder function cannot be used, please confirm the following:

[1] Inquire whether the call reminder function has been successfully opened;

[2] If the phone is turned off or there is no information number for more than 48 hours, this function will not remind you;

[3] If you set yourself to call other numbers, it will affect the normal use of this function;

[4] If there is a card replacement operation recently, you need to apply for this function again.

If you still can't use the call reminder function, please call the local customer service hotline 100 10 for handling.