no signal after upgrading to 2.2 iphone 3g

[jmchen3]

i have iphone 3g and after upgrading from 2.1 to 2.2 i lost signal.
it will have signal for like a second then it would drop.
i used pwnagetool 2.2. i also restore it back to 2.1 and quickpwn to 2.2 but still not working.
i think my turbo sim is messed up but iam not sure can someone help me.

 

[jmccullough108]

i have iphone 3g and after upgrading from 2.1 to 2.2 i lost signal.
it will have signal for like a second then it would drop.
i used pwnagetool 2.2. i also restore it back to 2.1 and quickpwn to 2.2 but still not working.
i think my turbo sim is messed up but iam not sure can someone help me.

You will probably have to do a full restore, then redo the process.

 

[jmchen3]

has anyone successfully jailbreak iphone 3g with turbo sim with cfw 2.2?

 

[bmcgrath]

I read somewhere that 2.2 disables turbo sims or malfuntions?
Not 100% sure....

 

[Chrysaor]

The use of SIM-Proxies (small circuit boards/chips that sit underneath the SIM card) to provide GSM/UMTS service on your locked iPhone 3G is a method that we have always advised against. Early reports suggest that the 2.2 update disables the functionality of these devices. The techniques used were always unreliable and we are surprised that they have lasted this long.

http://blog.iphone-dev.org/post/60830674/sir-step-away-from-the-keyboard