It's unfortunately gotten more difficult to test this, as quite a few carriers have configured the iOS devices on their networks to disable the ability to turn off 3G and favor EDGE.
But, EDGE is so slow, that I'm guessing that any power savings you get from going EDGE only gets canceled out by how much battery is wasted just waiting for your data to come down.
It's unfortunately gotten more difficult to test this, as quite a few carriers have configured the iOS devices on their networks to disable the ability to turn off 3G and favor EDGE.
I am talking about factory unlocked phones bought straight from Apple, sorry. Is 3G/4G so prevalent in your country that you can simple forget about good old EDGE/2G?
Doesn't matter. Even on factory unlocked iPhones, a carrier file can be used to dictate what network selection options are presented to the user, for as long as that SIM is inside the phone.
Is 3G/4G so prevalent in your country that you can simple forget about good old EDGE/2G?
In the US, AT&T has announced plans to sunset EDGE entirely by January 1, 2017, and the other major GSM carrier has announced plans to refarm its EDGE coverage to LTE by mid 2015. The remaining major carriers run CDMA networks, where EDGE never existed for them.
What's ironic is that, because of the original iPhone with no 3G, AT&T had to spend months backfitting their system for a higher speed EDGE so the new Apple device wouldn't look pitiful running at 59 Kbps. This also delayed their upgrading to 3G.
Reportedly some all 3G UK carriers even had to go back and deploy EDGE again.
Too bad the first iPhone didn't come out on Verizon. At the time, they required every new smartphone to have 3G.
EDGE (Enhanced Data rates for GSM Evolution) 2.75G -- 120Kbps to 384Kbps