Causes and solutions of mobile phone unable to receive SMS or verification code

The mobile phone cannot receive SMS or verification code for the following reasons.

The mobile phone mailbox is full.

You can check whether the mobile phone mailbox is full first. If it is full, please delete some information.

Hardware factor

I still can't get it after deleting it. You can change the machine or card to see if it is a hardware factor.

weak signal

After eliminating the above reasons, you can try to test whether it can be received elsewhere to see if it is the reason for the weak local signal.