What should I do if my mobile phone can't receive customer service SMS?

if other short messages of your number can be received, but you can't receive Unicom short messages, it is not excluded that Unicom short messages are blocked. If there are recharge offers, the latest preferential information and other contents, Unicom will send them through port 11. If you block port 11, it will affect your normal reception of such short messages. For details, you can contact the local Unicom customer service for verification.

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