I currently have a Blackberry 8310 locked on O2 and i just cant get to grips with it so i am returning to my previous phone. My son is on UK 3 Mobile i am just wondering if i would be able to unlock the phone to support this network as i have heard that i can't. If i can't i would be looking to sell, the phone is basically in perfect condition would anyone know the price?

You should be able to unlock it and use it with any network.
Just search on this forum for unlocking. I know that there is a guy who is a frequent poster here that unlocks phones. I haven't dealt with him personally, but lots of people recommended him.
Cheers

Thanks i am just worried about the whole thing that 3 is 3g and a blackberry will not support that. Has anyone here had any personal experience of unlocking to 3UK or know that it will definately work?

Wirelessly posted

3 does not sell Blackberries and therefore they have no blackberry internet service packages. Will a 2g device run on their 3G network? Possibly not.
I have heard that it can be tricky to unlock to 3. Unlocking from 3 is easy though as I did that, I only left 3 because they didn't do Blackberries. Great network!
A. Reputable unlock service would refund your money if they cannot source an unlock code for the device.

For an idea of what the device sells for take a look on eBay. It will be worth more money unlocked.

If you are still with o2 ask them for the unlock code for 'travelling Abroad & want to use a local sim '