Call Quality - Echo - Feedback

[sychosis]

Echo

I'm on Orange UK, only had the Lumia 900 a few days (10/5/12) and I'm having issues with callers telling me they are echoing

 

[trytim]

One year down the line any resolusion on this issue everyone talking to me keeps complaining of a noise coming from my phone

 

[giffis]

I send my phone to Nokia care. And they fixed this issue. The fix log says they updated the software and did all quality test. YES, now I have WP 7.8 on my Lumia 900 installed by Nokia Care. I don't think they did any hardware fix for this. @AT&T