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When the iPhone is in the LTE network, there is a problem of poor quality of the outgoing voice, at the same time the incoming voice is free of interference. The problem occurs several times a day. Fixed by enabling airplane mode or forced switching to 3g network.
Are there any other solutions? is it a warranty service?
iPhone 11, iOS 13
Unless you have a cover that can obstruct (interfer with) your microphone (but in this case there shouldn't be any difference between LTE and 3G), I would try and contact your carrier and explain your problem.
If they don't help you, then yes, make an appointment and have your device inspected at an Apple Store or Authorized Service Provider:--> Apple – Location Selector
Regards
Giulio
Unless you have a cover that can obstruct (interfer with) your microphone (but in this case there shouldn't be any difference between LTE and 3G), I would try and contact your carrier and explain your problem.
If they don't help you, then yes, make an appointment and have your device inspected at an Apple Store or Authorized Service Provider:--> Apple – Location Selector
Regards
Giulio
Under Cellular in settings, is cellular data on?
What about Cellular data options, what does it say?
Is LTE on?
is Data Roaming On?
Settings, General, Reset all settings.
I do not have an official Apple representative office in my region (
the microphone is definitely correct, because voice distortions via Internet messengers are not noticed
LTE on, VoLTE on/off, Data Roaming on/off - there is a problem,
LTE off/3G on, Data Roaming on/off -there is no problem
Cellular data options - only LTE, VoLTE on/off & 3G
poor voice quality iPhone 11
