I am at the end of my 3G contract, on a blackberry 9700, but am am wondering whether I should sign up to the o2 On and On deal. £26 per month, unlimited mins/texts £260 for the phone. It works out cheaper than Orange/T mobile "the works" deal and Vodafone's Red deal. Only issue is that as its on o2 I will not be able to get 4G LTE due to the frequencies. Shall I switch to a 3G tariff on Orange/T Mobile so that when I do get 4G LTE and join EE (when the price reduces) I won't have to pay the remaining of my contract ? Is it worth it ? Please help !