What should I do if I can't receive the verification code SMS?

Take Unicom number as an example. The failure to receive the verification code message may be caused by the following reasons:

1. You can check the settings of your mobile phone if it comes with an interceptor or an application you downloaded yourself.

2. Incorrect input of receiving number. Please check whether the input receiving number is correct.

3. The product service provider cannot send SMS. If you can't receive the verification code message, other messages can still be received. You can contact the product service provider that sent the verification code for feedback.

4. If the above three problems are not solved, you can contact the Unicom customer service of the number for help.