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What if there is an exclamation point behind the ipad wireless logo?

When there is an exclamation mark behind the ipad wireless logo, which makes the device unable to access the Internet, it is recommended to restore the network settings.

The operation is:

Step 1: Click the "Settings" icon on the desktop.

Step 2: Open General and select Restore.

Step 3: Select "Restore Network Settings" to restore the network: