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Calling *#21#

What does it mean when you call *#21# and the first six lines say:

’error performing request

unknown error

setting interrogation failed

voice call forwarding

on all calls’

iPhone 7, iOS 13

Posted on Jul 23, 2020 2:28 PM

Top-ranking reply

Level 6

8,512 points

Posted on Jul 23, 2020 3:06 PM

You will need to ask your carrier about it; the code you have typed in and called, it is to enable/disable services that they manage.

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