got a 3 mobile middle of last year. Only had it for a week and i took it back and cancelled it. the battery on standby lasted 3 hours. waited 45 mins to talk to some dickhead at customer services because my phone hadnt been activated and then for another 5 months after i cancelled my contract i was still receiving bills. Each month i would call them: yes sir your contact has been terminted etc and then another one would arrive. How they expect to survive as a business in a competitive market is beyond me.
As it happens t-mobile literally begged me to come back to them so all was not lost, but i sympathise with people on here to have nothing but hassle.