Xseries :: X3-02 Audio Feedback Noise After Update?

Just updated my x3-02 firmware to 7.16(Ok, Nokia suite couldn't restore settings, but thats not the problem)Every phone call, since the update, I can hear myself when i speak. This is NOT the delay you have with some providers.The problem becomes very annoying if there is a strong ambiant noise. For example I recently had a phone call while watching tv.I could hear the tv in my ear, it was coming through the microphone of the phone.But as I have it loud, this sound goes back through the microphone, creating a loop. and giving a strong high feedback sound. (this stops when i go into a silent room)(its like in the radio, when the radiostation calls someone on the phone and they dont turn the volume of their radio down)No, I am not using handsfree or speaker mode. Just plain phone call, the phone on my ear.Normally ( it was like that before) I could NOT hear what was going into the mike, only the person on the other end of the line should be able to hear it.

PS: it has nothing to do with the provider, as my other Phones work perfectly with the same sim card.(I use the x3-02 in the office as it is very small and fits into the breast-pocket of my suit.)