Called T-Mobile for PAC code to transfer to tesco mobile £15 deal
I was offered straight away
30 day rolling contract
I was told its normally £ 20 but I will get £10 loyalty discount
I was on 12 months contract @ £35 with G1 mobile.
I was also offered before HTC Desire one off cost £49.00 on £35 pm and 12 month contract.
Hope it will help others