What happened when Samsung's mobile phone suddenly failed to receive SMS?

If you don't receive SMS or verification code, it may exist in the following situations:

(1) Check whether the mailbox is full; If yes, please delete some information;

(2) If you still can't get it after deleting it, I suggest you change the machine or card to see if it is caused by hardware;

(3) Check whether it is intercepted by mobile phone interception software;

(4) Check whether the cell phone signal is normal, and try to test whether it can be received in other places.

If the above reasons can't solve the problem, I suggest you contact Unicom's manual customer service to verify the handling. The actual situation is subject to local policies.