Upgraded to a 7 from a 6s and have had constant issues with call quality (sounds garbled, intermittently cuts out, generally sounds like somebody is talking under water) while over LTE. Turning off LTE voice appears to fix it, but then call quality isn't great in general... I saw the 10.0.1 update was supposed to fix an issue with this, but that didn't make a difference. Apple swapped the phone out, and the new one has the same issue. Anybody else running into this? Seriously considering going back to my 6s... I'm on AT&T FWIW.