Samsung D900 E250 BNIB Open all Networks Mobile Phone

I brought it because my girlfriend needed a cheap phone with a camera and this item was perfect. My girlfriend is very pleased with it.

Phone arrived later than said on description, was delivered on saturday 21st, I could not get it until monday 23rd as no-one in to sign for package.
Phone has NOT worked on my network (O2) even though we no problems with coverage at my address, in fact my old handset is working perfectly well in exactly the same position as the new one with full signal. The new samsung works for approx 60 minutes before loosing all signal and displaying no network. I took it to a phone shop to ask them to reset it and even then it only lasted the same amount of time before loosing signal.
Would very much like to return it and have full refund.
What do I like about it? The colour, why did I buy it? Thought I would have a phone that worked. Oh, it takes a good photo.
Please contact me either on e-bay e-mail address or 07706 809608.
Thankyou.