The conclusion for my problem was to scrap the idea of the t mob deal ; as she was mad keen on the Blackberry 8520 and I couldnt find another phone she liked as much! Even if it did work I was going to have to fork out £200 on a phone; so i spoke with our existing provider ( she is on my account) even tho i had cancelled her phone and was working thro the 30 days. They gave her the phone( or will do as i have it hidden away for xmas!!) on a 18 month deal for £25 that was for 600 mins unltd txt ,unltd net and including the blackberry bit. They also put a £20 limit on any excess she may incur ; but to be honest I don,t think there will be any ;its the txting ;she went 500 over on her last 1000 txt deal when she split with her boyfriend hence £50 plus bill
The only condition was that I also upgrade(i was due end of last month) so I am now the very proud owner of an HTC Tattoo; which is great

;also for £25 for 300 mins unltd txt ,unltd net and again for 18 months
trouble is she likes The Tat !!