Hey guys, I was hoping someone could shed some light on this as it's driving me insane.
I bought an iPhone 3G 16GB on eBay, along with an o2 sim with the 12 months unlimited web. Get them both, try them together and get "No Service" in the top left or just no signal. It also couldn't activate because of this. So, I had after looking at some online solutions I decided to jailbreak and unlock it with ultrasn0w.
I did that, put my old Orange sim in and it seemed to work a treat for the rest of the night, I was able to call out and text. However, the next day it was back to the old "No service". I tried to put the o2 sim in, but that showed no signs of life and didn't work even slightly unlike the orange sim.
I then read a guide which said to put the sim in another phone, call out and put it back in the iPhone. This seemed to work for Orange, although it only lasted briefly. Still the o2 sim showed no signs of life.
Here are some other solutions i've tried:
-Toggle Airplane mode for 15 secs
-Reset Network Settings
-Reset All Settings
All to no avail. It suggested to me that the seller may have stole the phone and it's barred but if that was the case surely I wouldn't have had any success with the Orange sim?
Anyway, thanks for reading and i'd really appreciate any input from anyone who has managed to read this essay of a post.