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No sound with TTY call


New Member
Mar 10, 2021
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I have an iPhone 6S+ 128 GB on iOS 14.0 with Sprint, and if I turn on Software TTY there is no sound when making a TTY call. We have a Sprint iPhone 8 on iOS 14.0 and it has sound on TTY call. There is supposed to be a Mic Icon in upper right corner to mute or unmute call, but my iPhone 6S+ has nothing. Sprint checked my phone over chat and everything is fine. Apple chat also checked it for any hardware issues but there are none. I also reset and erase all yet still have same issue. Does anyone have an iPhone 6S or 6S+ with sound on TTY call working and a Mic icon in upper right corner ?

Thanks a lot

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