Jailbreak issues? Phone issues? Carrier fault?

[Anisotropix]

Hi people, I am from Singapore. Lately I have been experiencing alot of problems after jailbreaking. Now I do not know if it's the carrier's fault or the phone's fault, OR the jailbreaking fault.

I have restored my iPhone4 from a jailbroken 4.1 to an unjailbroken 4.2.

The problem is that it always shows me No Service, after many reboots. I have resetted network settings, resetted ALL settings, the airplane mode method, and the ultrasn0w method.

I am desperately in need of help.

I do not know wether this fits into this forum topic, but if it is not, Moderators, please help me move it to a suitable place

My carrier name is Starhub.

-ian

[LSZ33]

what Firmware are you on right now? You stated 4.2 but it should be 4.2.1. Try to restore your iphone with another computer to 4.2.1 and when it's done restoring, set it up as a new phone. It seems that your phone isn't being activated. Before doing this, you could swap in a different sim card and connect to itunes to see if that resolves your issue.

[Anisotropix]

I am running on firmware 4.2.1 and I am always getting no service . Damn apple really pissed me off this time.

[iYeow]

Is your iphone the official carrier for your iphone ? If it is not, then you have a locked iphone.
If it is , then restore to 4.2.1 again and let your sim activate it before you jailbreak it.