3G vs. 4G settings

[dandil]

Before ICS you could turn off 4G to save on battery. I don't have 4G in my area so it is set just to 3G. Where is that setting with ICS? Going on a trip and want to turn the 4G back on (want to start to both).

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[delldude405]

http://www.droid-life.com/2012/06/23/tip-how-to-turn-lte-off-on-the-razr-with-ice-cream-sandwich/

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