Iphone has no APN setting in Cellular Data even after update to 9.2

I have got a 4s which was on ios9.02 that didn’t have APN Setting in its Cellular Data setting so first I reseted network setting ,all setting and erase all setting but still same than updated to ios9.1 than check with other simcards same I just updated to IOS9.2 still same ,phone is factory unlocked so how to fix this problem ? Any IDea ?