The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
The Apple Support Community will permanently close on November 20, 2026. Starting today, the site will no longer accept new posts and is available in a read-only state.
You can continue to find trusted guidance and support on the official Apple Support site.
We want to thank the community members who have contributed their time and expertise to help others with their Apple products.
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
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.
Calling *#21#
