do I turn off my data when wifi on iPhone 4s with AT&T
Hi rocky76! I don't have an iPhone but I do have a smartphone. I usually turn my data connection off when I'm using wifi although, if I want to send an MMS or receive one, I need to turn my data connection back on.
My friend that does have an iPhone never turns off her data connection, even when around a wifi signal...it should automatically switch to wifi for you. But if you want to be on the safe side and you're trying to not go over your data limit, I would suggest turning your data connection off when using wifi.