ringtone volume is low
In Settings > Sounds & Haptics I have set Ringers and Alerts to max volume.
Under Ringtone I select Reflection and it volume is high.
When I call, the ringtone for the first 5 to 15 notes are OK, but the remaining playback volume is maybe 33% of what it should be.
Do I have a problem with my one week old iPhone 11 and do I need to take it to an Apple Store?
Or should I be able to exchange it at the T-Mobile store I bought it from?
BTW I went to the T-Mobile store and the sales person didn't know what the problem was.
TIA
iPhone 11, iOS 13