Hi I bought an iPhone 4 used without a sim from a family member and I reset it to factory settings and I can't set it up because I NEED a sim, I need t-mobile pay as you go because that is what it is locked on. If I buy this: http/www.amazon.co.uk/dp/B005CD1X7O?tag=tesicai-21 then I insert the sim and then: http/www.t-mobile.co.uk/shop/pay-as-you-go/plans/ if I texted the SMART10 deal will it then work? Thanks but need fast reply !