My carrier does not seem to be getting an iPhone 4S anytime soon so I might switch to Telus. My carrier offers unlimited text, unlimited data 400 minutes all for $60 a month. For the last two months i've used 8 gigabytes of data. Telus on the other hand offers everything my carrier does minus the unlimited data, Telus only offers 5 gigabytes of data for the same price, so if I switched to Telus I would have to use wifi when i'm at my dorm. Telus also charges an extra 0.05 cents per mb. So my question is when Wifi is turned on does it suck more battery life then having wifi turned off ? As apple states better battery life for wifi internet use,but I would assume with 3G turned off.