Unable to receive SMS verification codes from Tencent Technology, JD.COM and Khalid.

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

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

2. If you still can't get it after deleting it, you can change the machine or card 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 you have tried to change your mobile phone card, you still can't receive the verification code. This situation does not rule out that there is something wrong with your mobile phone card. I suggest you take your mobile phone card to the local Unicom business hall for testing. For details, you can also contact the local Unicom customer service consultation.

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4G primary and secondary cards:/02 UPY;