This is a weird problem...

Unit is 1.1.2 OTB used with BuddySIM for more than 5 months without problems until yesterday, the phone signal dropped to zero. Took out SIM and replaced with new BuddySIM with no results.

Only option... restore to .1.1.4 via iTunes and Jailbreak, Activate, Unlock with ZiPhone. No luck either... WiFi ok but GSM/EDGE remains as 0. Tried Maxis and Celcom SIM cards also no luck.

What could b the problem? Any ideas where or how to fix?