No Signal after Update to 4.2

I Updated to 4.2 the other day (23'rd) and it all worked fine...
Was at a friends house and didn't bring charger so it ran out of power during the night. The 24'th I recharged it and when it recharged I had "No signal" even though I was near the copenhagen central station (usually full bars there). Tried upodating to 4.2.1 and downgrade to 4.1. Tried everything on apple's Q&A but nothing helped...
Anyone know a solution...
Also tried recovery mode, but no luck...
Tried makin recovery to a previous saftycopy of the options on it, but still nothing... Now I have an Iphone that worked perfectly fine before, but now "No Signal" at all times...
Can anyone help? Anyone had same experience...
Read on the internet someone had same problems but no solution... Someone sayin it was the Firmware for the modem, that got messed up in 4.2..
Can u help a frustrated guy?

What do you mean by a "certified" store? Was it carrier unlocked when you bought it? ALL iPhones sold in Denmark are carrier locked and the only carrier that offers unlocking after purchase is 3.
The fact that it won't even activate now is consistent with the phone re-locking to another carrier. Officially unlocked phones won't re-lock. There is no way to "force" it to activate with a carrier.
Message was edited by: modular747

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