[ChRoss]

In my office room, hardly get the 3G status, but the phone signal is full. I had no problem with my previous phone (Dopod).

[CountSessine]

Was your Dopod GSM, UMTS, or CDMA? UMTS and CDMA phones won't do generate audio-domain interference. Any 2G GSM phone, from the most expertly-designed Nokia or Ericsson to the worst Huawei will interfere with your speakers.