iPhone requires restore, error 23?

[christy.shaw]

I recieved a second hand iPhone 3G today, and it seemed to be working fine for a few hours. I got a text from my network giving me a link to download a profile for browser settings, which I downloaded. Maybe a coincidence, but after I did this my network had no signal, wifi wouldn't connect etc. I uninstalled the profile, and my phone came up with a message saying a restore was needed, and proceeded to go to the black and white apple logo screen.

Steps I have taken so far with this issue are:

1. Hard reset - the phone just returned to the black and white apple logo screen and didn't boot up.

2. Connecting to iTunes to do a restore - the phone took a while to be recognised, and then iTunes had an error message saying it needed to be restored. I tried to restore it and got another message saying to device could not be found.

3. Putting into recovery mode and doing a restore - this time iTunes did find the phone, and allow me to restore, however at the end of the process I got an error with code (23).

I've ran out of things to try now, any ideas? What is this error 23?

My phone is now on a loop, it sits on the black and white apple logo screen for ten seconds or so, then swaps to the "emergency call only" screen with connect to iTunes too.

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[jonolach]

I'm sure it's the logic board
Hope you're under warranty
Otherwise you're phone is a big paper weight