DTMF touch tone options not working on iPhone 12 - help!

I have a problem when receiving conference calls on my iPhone 12, running iOS 14.4.1


I need to select various keypad options in order to join the call using touch tone/DTMF. When I select them on the keypad, no input is not recognised and I cannot join the call. This is the same whether on speaker, or not.


Putting mute on is not working. I have found that I can make DTMF selections when dialling out.


This is causing me huge stress, if anyone can help?


Best wishes.

Posted on Mar 19, 2021 7:55 AM

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2 replies

Mar 21, 2021 6:23 AM in response to C4Hj0L_w

Hi C4Hj0L_w,


It sounds like when you receive calls DTMF tones aren't recognized but do work when dialing out. We're glad you've joined us in Apple Support Communities, and we can provide some assistance.


You'll want to confirm that your carrier settings are up-to-date. Here's how: Update your carrier settings on your iPhone or iPad. Updates resolve issues both big and small. 


If the issue remains, have you spoken with your carrier? If so, what did they say? You'll want to contact them to rule out any issues with your carrier network since calls connect through their service.


We hope that helps with your question and take care!

Mar 21, 2021 6:23 AM in response to C4Hj0L_w

Hi C4Hj0L_w,


It sounds like when you receive calls DTMF tones aren't recognized but do work when dialing out. We're glad you've joined us in Apple Support Communities, and we can provide some assistance.


You'll want to confirm that your carrier settings are up-to-date. Here's how: Update your carrier settings on your iPhone or iPad. Updates resolve issues both big and small. 


If the issue remains, have you spoken with your carrier? If so, what did they say? You'll want to contact them to rule out any issues with your carrier network since calls connect through their service.


We hope that helps with your question and take care!

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DTMF touch tone options not working on iPhone 12 - help!

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