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What if iphone4 can't receive SMS?

1, enter Settings-General-Network-Cellular Data Network-Recovery, and restart the phone after recovery.

2. After restarting, enter Settings-General-Network-Cellular Data-Open in turn, and then enter "Cellular Data Network". Cellular data APN:cment, user name and password are all left blank. The MMS parameter is set to APN:cmwap, and the user name and password are empty. Mmsc.monternet.com MMSC, MMS agent: 10.0. 172: 80, maximum MMS volume: 102400. URL: leave blank.

3. After the setting is successful, it can be used normally after restarting.

The answer is not easy, I hope I can help you, please help me adopt it if you are satisfied, thank you!