Iphone 3g no service after jailbreak/unlock?

Iphone 3g no service after jailbreak/unlock?

Yep. It's a 3.

Firstly go to settings
Click on General.
Click on Network.
inside there- TURN OFF 3G AND CELLULAR DATA

then go to cydia, uninstall Ultrasn0w and reinstall it. Then reboot your iPhone.

Does it now detect the network?
Let me know.

P.S- inorder to UNLOCK you HAVE to use Ultrasn0w.
Ultrasn0w will ONLY work with the following modem firmwares- 04.26.08, 05.11.07,
05.12.01, 05.12.04, 06.15.00.

If your iPhone originally had 5.14 or 5.13 or 5.15 or 5.16 then you can't unlock them. You would need to use redsn0w to patch the iPad baseband to your iPhone (6.15) and then follow the instructions that I gave you.

Hope that helps.
Have a good day foryou!