Iphone4s [cellular data network tab missing!!]

Hi everyone i have an iphone 4s grom japan softbank and unlocked here in th philippines. I was hoping that if i upgrade to 7.0.2 the cellular data network will appear and i can set up my apn, because i cant use internet using promos. Back to ios6.1.2 when my phone unlocked cellular data network tab qas also missing. What should i do? Pls help

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