Possible harm re-running jailbreak.com?

Folks, i got an iphone4 with 4.0.1 that was unlocked using jailbreakme.com. Yesterday, i dropped the phone from maybe 1 feet, it stopped working. Since then im not getting any service at all, its an att phone and i cut my tmobile sim card to use it on tmobile, it was working fine before the drop and now its not working at all? I looked in cydia and somehow the ultrasn0w disappeared after the drop, so redownloaded it and still no service. I was thinking of re running the jailbreakme.com. Is it ok if i should do it or not? This thing is pissing me off :(

Did you backup your SHSH for 4.0.1? The safest way to rejailbreak is to restore using cached shsh and then rejailbreak

I think u have a hardware problem. Either the drop has affected the alignment of the sim socket and contacts or you have damaged the main board of the iPhone. A restore would help diagnose that. You could also use a syslog of a restart to diagnose the problem.

Sounds like you will need to restore. And I don't believe you can rerun jailbreakme.com

You can try, worst case scenario, restore.

thanks guys, i was able to get service without restore. Lets see how long this lasts. thanks