Why can’t I make calls and send text messages while surfing the Internet?

According to the information you provided, if your number can access the Internet, but cannot make calls or send text messages, it cannot be ruled out that it is due to a malfunction of the SIM card or a malfunction of the mobile phone. It is recommended that you change the phone and test it first. , if it still cannot be solved, it is recommended that you contact the manual customer service of China Unicom for verification or go to the local China Unicom business hall for testing. The actual situation shall be subject to local policies.

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