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I always have mine off unless I need it.

I am on pay as you go and I get 500mb (for a month) when I topup. I don't want the phone randomly looking up stuff and wasting that if I am not using it.

Plus I make calls so infrequently I don't top up every month so for the most part I don't have any "free" data so I don't want my credit being leeched by errant apps doing stuff that I don't know about.
 
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If battery is getting low and I'm not close to a power source I may well turn off data for a while to ensure I can always make and receive calls.
 
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If battery is getting low and I'm not close to a power source I may well turn off data for a while to ensure I can always make and receive calls.

I am asking because of iMessage. It will not be delivered when my data is off.
 
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Does it not send as an SMS? As I'm on unlimited txt plan, I'm less bothered about it.
 
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Does it not send as an SMS? As I'm on unlimited txt plan, I'm less bothered about it.

I am not worried about data either, I am worried about battery.
 
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How do u turn off 3G? Not airplane mode?
 
Turning off anything is not even considered on my iPhone. Unlimited data (ATT) and my battery last more than long enough to get through a day.

I guess I am spoiled as I never even worry about it.
 
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Stealthipad said:
Turning off anything is not even considered on my iPhone. Unlimited data (ATT) and my battery last more than long enough to get through a day.

I guess I am spoiled as I never even worry about it.

At work I keep mine in a locker so I have to do airplane
Mode. Otherwise I wouldn't need it
 
How do u turn off 3G? Not airplane mode?

On the 4S, you can't turn 3G off. But, you can turn off data by going to Settings -> General -> Network. "Cellular Data" is the switch at the top.

I've done it once, but only when I went over my cap while traveling to cut down on the overage.
 
I've turned off cellular data for 2 reasons. First was when I went out of the country. Second was when I was in danger of going over my monthly data allotment. Otherwise I just leave it on all the time.
 
I only turn it off once AT&T messages me that I'm using 90% of my 2 GB. Other than that, I see no reason to. The difference in battery life is only a couple of hours tops.
 
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