Huawei mate 10pro Mobile, Unicom has two cards, Unicom card is set as a flow card, and Card 2 mobile card cannot receive information. What is the reason?

You can't receive SMS or verification code due to the following reasons:

1. Please check whether the mailbox is full first. If it is full, please delete some information.

2. If you still can't receive it after deleting it, you can change the machine or the card slot to see if it is a hardware factor;

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

If the above problem does not exist, please contact the local mobile customer service hotline to handle this problem.