The Galaxy Y automatically turns off data when wifi is connected but if you lose the wifi the data will kick in automatically and you will use data even though you "think" you are on wifi, so just make sure you see the wifi symbol at the top of your screen and you will be fine. Also, in wifi advanced settings, switch wifi sleep policy to "Never", this will ensure wifi stays on when phone is asleep and not leak data with screen turned off.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.
.gif)
