Yea disable 3G. The problem is within the phone itself.

I got my phone from Rogers, a Canadian cellphone carrier. I did not jailbreak/unlock my phone (since I'm using the carrier, I do not need to unlock it). With the 3G on, I was able to receive call, but the line will be cut within few seconds. But the phone will work finely after a reboot. After several days, the problem is back. Then the Rogers guy told me to tuen off 3G and it works perfectly fine after that

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Added on May 26, 2009, 9:50 pmHA I can answer question about turbo sim. I am a turbo sim user.
First of all, do not get panic when u see "No Sim" or "No Service", however you should be nervous when u see "Invalid sim".
Getting turbo sim to work is a lot of work and requires alot of patient. It took me 4 hours to get it to work.

Spycat, try resetting your network setting. more detail read http://forum.lowyat.net/topic/1008190/+71

About 3G, you can still surf net with EDGE or WIFI.

This post has been edited by kaika: May 26 2009, 09:50 PM