Hmmm, I had the same problem before I switched to T-Mobile. 2.5 is not 3G and there is a big speed difference between those. Most importantly with 3G you can use the connection for internet and still get the phone calls/sms at the same time. I guess this is the issue you're having right now. But you said that you're connected wireless router. That's interesting. Most of the time I was listening to online radio and missing those all calls.