I can't send DTMF tones during incoming calls. I can make outgoing calls and send tones just fine.
I am on an iPhone 7 Plus, running the latest iOS 10.3.3 version.
Wi-fi calling is off.
LTE set to voice and data, or data only has no effect.
Thank you for reaching out to us. Does this happen on every incoming call? When did this start happening?
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