No Service after Upgrading to 4.1

[m.zdila]

Hello

I upgraded my iPhone 3G from jailbroken and unlocked 3.1.2 to 4.1 (8B117). I used sn0wbreeze 2 expert mode with Hacktivation and preinstalled ultrasn0w package. After uploading the firmware I see only one signal bar without carrier name and after cca 1 minute only No Signal. Every call fails with "Call Failed".
The phone was originally branded to T-Mobile Slovakia, but it behaves the same way with their SIM. My baseband (Model Firmware) is 04.26.08.

Other issue is when I want to restore from backup with iTunes 10. I get "iTunes could not restore the iPhone ... because the backup session failed". I tried this on 2 computers with the same result.

Any advices?

Thanks in advance.

Martin

 

[mac&cheesey]

Hello

I upgraded my iPhone 3G from jailbroken and unlocked 3.1.2 to 4.1 (8B117). I used sn0wbreeze 2 expert mode with Hacktivation and preinstalled ultrasn0w package. After uploading the firmware I see only one signal bar without carrier name and after cca 1 minute only No Signal. Every call fails with "Call Failed".

I had the same problem (no carrier name, no signal, calls fail). In the settings area I didn't even have the area for "network". The only thing I could do to fix it was to re-jailbreak. That worked.

Good luck,
m&c

 

[Darlyn]

I'm having the exact same problem. Updated from 4.0 to 4.1, one signal bar, and no carrier for a few minutes, and then No Service. I used sn0wbreeze as well. mac&cheesey, how many times did you have to re-jailbreak? Did you use sn0wbreeze?

 

[Carlanga]

use Pwnage Tool instead

 

[kalirob99]

Yeah, just rejailbreak. If that doesn't work just restore and do it over. This can happen. Odd that you don't have a network reset in your reset in general though.

 

[Darlyn]

sn0wbreeze is a Windows port of Pwnage Tool. :/

I have reset my network settings multiples times without positive results. Will try jailbreaking again.

 

[Carlanga]

sn0wbreeze is a Windows port of Pwnage Tool. :/

Not really, sn0wbreeze is a port of xpwn (pwnageTool command line version) so its nearly the same but not... as far as I know pwnageTool is using geohot bootrom exploit the same one in limera1n and greenpois0n and I don't know if sn0w has been finally updated w/ that exploit yet but last time I checked it was not. The sn0w 'port' is always buggy and gives many people problems so use it if you want but Pwnage is more stable and simpler to use...

 

[Darlyn]

Woah, sorry for the double post, but all I did was restore to an non-jailbroken state and my SIM is suddenly recognized. It's an H2O Wireless Universal SIM, and because H2O is a virtual carrier that runs off AT&T's towers, the iPhone need not be unlocked. Anyway, I'm going to jailbreak and see what happens now.