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What's wrong with Apple's mobile phone not receiving SMS verification code?

Because SMS filtering for unknown senders is turned on in the settings, it can be turned off in the settings.

Materials/Tools: Apple mobile phone.

The specific operation includes the following steps:

First, open "Settings" on Apple's mobile phone desktop.

2. Click "Information" in the setting center to enter.

Third, the current status is on, shielding unknown sender information.

Fourth, just click the button on the right to close it.