Iphone 3G lost service

[MDG12345]

Hi,

I jailbroke my iphone 3G with iOS 4.0.2 with redsnow 0.9.5b5-5 for windows. I then unlocked it using ultrasn0w. It worked great for about 2 weeks but today just lost service. I have tried reinstalling ultrasn0w a bunch of times and have also tried toggling the airplane mode on and off. When it finds a carrier it's Rogers Wireless, even though I have a Koodo SIM card in. Does anyone know how I can get service back?

[Poseidon79]

You can always try a fresh restore and start all over making sure to set the phone up as new in iTunes. Have you download any mobile substrate apps lately? That might be causing issues.


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[MDG12345]

No I haven't put any new apps on. If I restore it though won't it go to 4.1? Do I need to shift + restore to an old iOS?