menu button/ system settings/ More... Mobile networks/ Network Mode// then you simply select Global or LTE/ CDMA OR GSM/ UMTS. HOW EVER I LEAVE MINE ON GLOBAL MOST OF THE DAY AND LEFT IT ON YESTERDAY ALL DAY WITHOUT CHARGING AND THIS MORNING SO FAR AND HAVE PLENTY OF BATTERY LEFT. sorry my caps wouldn't turn off, anyway that's what i found,, now i could be completely wrong but it's what i have so far.,, and btw i LOVE ICS!!!!!! ok it seems that i mis spoke,, and it does not only give for 3g,, it's 4g,3g ,,,,,, LTE/CDMA Gsm isn't even 3g but it will save a ton of battery lol,, my apologies.