What on features on a iPhone still work if your service isn't on? (FaceTime, iMesaage etc)?

What on features on a iPhone still work if your service isn't on? (FaceTime, iMesaage etc)?

Facetime will not, texting will work but it'll only text certain numbers, and calling will. This is if you turn off data, not if you go to a place without it.

Pretty much everything will work except for calling, texting (SMS/MMS; iMessage will still work) and mobile data.

Alex left out some important information.

FaceTime has nothing to do with your service. It will work, as long as you have Wi-Fi. You can't send regular Text messages, but you can send iMessages, but they will only work with other iOS devices; you can't iMessage a person on Android phone.