I have 100% the same problem on Vodafone Germany.
On gsm Its fine but not 3g or LTE there is hiss when other person speaks. Its more noticable when I place a call but when I recieve a call its more or less ok.
I have contacted HTC and they are TOO SURPRISED that there are any kind of Static sound or HISS as for them NOBODY ever reported this.
I will give my phone today to exchange with S4. If I cannot avail the main purpose of PHone, i.e to Telephone, whats the use of other CHIC CHIC
Originally Posted by KOLIO
It's a work in progress.
I was finally able to find someone who has the ONE on T-MOBILE to troubleshoot/duplicate the issues.
Same results,over-amplified/distorted sound quality w/BLUETOOTH on phone calls (BOTH ENDS,w/& w/o BEATS on),audio via streaming/music player is fine.
Also duplicated w/another B/T on my phone.
My B/T works fine on other non-HTC ONE phones.
I've been in touch w/HTC through the entire troubleshooting process,communicating w/the same team members each time,at the entry-level & TIER 2.The engineers are actually troubleshooting as we speak.
Just a guess here,but,perhaps the problem may be a result of a conflict w/T-MOBILE's HD VOICE & HTC's SENSE VOICE.I realize both ends of the phone conversation have to have HD VOICE for it to work,but,all calls are affected.
Anyway,even if this isn't the cause,I thought it was worth mentioning to the HTC VIP SERVICE/TIER 2,etc....
They've been keeping me posted w/o prompting,so,I'm confident they're working on it & I'll post here on a weekly basis or thereabouts w/updates.