Interogation code #21 does not work on my iPhone

Is my phone tapped? When I input the various codes, I.e., *#21…etc., they all come back with a recording. The recording says something like “I’m sorry the number or code you have entered is incorrect. Please try again”? I’ve re-entered them several times— with same answer.


[Re-Titled by Moderator]

iPhone SE, iOS 16

Posted on Apr 16, 2023 4:35 PM

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Question marked as Top-ranking reply

Posted on Apr 16, 2023 4:40 PM

Contact your carrier.


With your current approach, you may well end up changing a carrier-related setting you didn’t intend to or didn’t want to or don’t want to change here, as each carrier can have their own codes.

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Interogation code #21 does not work on my iPhone

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