Iphone 3g No Service after Jailbreak

Iphone 3g No Service after Jailbreak

OPTION #1

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.

OPTION # 2

How To Fix No Service issue iOS 6 ? on iPhone 5, 4S, 4, 3GS and iPad 3, 2 - No service issue After iOS 6 update is a public issue spread all over the web as a fire, we have received many emails regarding this issue and the ways to fix it we will show you in this post how to fix this issue.

How To Fix No service issue after iOS 6

Step 1: Go to Settings App

Step 2: Go to General then scroll down until you find Rest

Step 3: Go to Rest and Select Rest Network Settings then your device will inform you to enter your passcode

Step 4: Your device will inform you also by the message below then select “Rest Network Settings“

Note: take care Rest Network Settings will let you lose cause all your WIFI passwords,

Step 5: if the error still appears so its better to restore your device here’s the link that you will use