I haven't updated any software, wasn't even connected to WIFI when it happened. In the evening calls worked, woke up in the morning - they don't.
Happened around a month ago, on completely stock Sense 6 KK 4.4.2. HTC have since rolled out a mini update about a week or 2 later, hasn't helped. OTA doesn't install by default, in case you were wondering.
I've seen people saying they get no sound in calls, but it works on speaker or BT headset, or wired headset etc.
Nothing works for me. Tried connecting BT, headphones, headsets, removing SD cards, increasing in-call volume (duh)..
Calls connect with no problems, reception is full, either GSM or HSPA, no sound received or sent.
Dialing numbers in call does go through, though .
I tried soft reset, hard reset, mediocre reset, factory reset
I've even unlocked bootloader through HTCDEV, rooted, flashed several custom roms and kernels (MaximusHD13, InsertCoin 2.4.0, InsertCoin 3.0.6, Falter1.1 kernel, Project Era, Monarudo M7 Port, and so on...)
Of course, fully wiping EVERYTHING between attempts.
Failed to S-OFF so far.. both firewater and rumrunner.
Lets see what else..
I have the 901S variant. 044 if I'm not mistaken
Here's my bootloader:
*** TAMPERED ***
*** UNLOCKED ***
DLXP_UL PVT SHIP S-ON RH
Hell, I've even tried contacting HTC but their chat doesn't work for me, sending email through the site just loads forever and sending a regular email got no response.
I ordered the phone from Singapore, and I live in the middle east. So local support is out of the question for me...
The only thing I have yet to try is getting another sim in this phone or my sim in another phone, but I can't seem to find anyone with a micro sim
Thus, I resort to asking you guys for help.
P.S. The hardware works fine. Ran safe mode, hidden tests, skype calls. Everything works, other than sound in phone calls (even in safe mode).