Hi, Just bought the T-mobile Galaxy S3. Upgraded it to the latest version (LH2) using Samsung Kies (e.g. no custom ROM). When using Viber, I cannot hear the other person. Other person hears me fine. Have tried to deactivate Viber account, delete application data, uninstall, reboot, reinstall Viber. Tried with and without handset. On wifi and on 4G. Normal calls and Skype works fine. Any suggestions? Preferrabely without changing to a custom ROM, as I have no Android experience. I am an exchange student residing in the US this fall, so really need the Viber to work. Thanks.