[2.3 to 3.1.2] [3G] I need some help here.
I bought an iPhone 3G from a friend that is locked to Claro (local telephone company). The phone was using 2.3 firmware I believe..
So first thing I did when I came home was to follow this tutorial ( iClarified - iPhone - How to Jailbreak Your iPhone 3G on OS 3.1.2 Using PwnageTool (Mac) ) to get it on firmware 3.1.2
Everything went fine, no errors at all. But when it was done and the iPhone finished rebooting, I noticed that it didn't have any signal, and was VERY laggy. I mean it would take a second for the screen to turn on after I pressed the lock/unlock/power key. Once I was inside the phone, everything was very laggy, so slow that to open "Settings" sometimes it would take up to 7 seconds and once inside, navigating through it was slow as hell.
So I decided to re-pwn it with the same custom firmware that I created with PwnageTool.. Same thing all over again. Then I decided to Restore it again, but with the Original Apple Firmware 3.1.2. Now the phone is not laggy at all, and I can use it just fine. (I have a simcard from Claro, but its not mine)
So right now I have full access to the phone (no Cydia or anything obviously), with my real-simcard inside, but I have no signal at all since its locked to Claro.
So what can I do now? what would you guys recommend?
Some useful info taken from the Settings > About section:
Version 3.1.2 (7D11)
Modem Firmware 05.11.07
Any help will be greatly appreciated,