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I have GSam Battery Monitor, and it says that my Phone Radio is using about 80% of my battery. Why is this so high? I usually unplug my phone in the morning at 8AM, and I usually need to plug it back in between 2PM and 4PM. Maybe this is normal, but it seems very high to me.

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Is the phone running on LTE service? –  Compro01 Jan 17 '13 at 22:14
    
from time to time, but most of the day I am connected to the wifi. –  Ryan Naddy Jan 17 '13 at 22:14
    
Have you fixed it to some mode (3G or 4G), or is it set to auto-chose? In the latter case, especially with some "bad cells", this could lead to frequent switches. Moreover, the phone had to watch multiple bands for "strong signal". If possible, try to fix it to either 2G, 3G or 4G and see if this improves the situation. General rule: Higher numbers use more power (so 4G uses most, 3G less, and 2G minimal power). –  Izzy Jan 17 '13 at 23:09
    
@Izzy Okay. Last night I installed the phone's update to 4.1.1, maybe that will help too... How do I set it to use a specific type (2/3/4G)? –  Ryan Naddy Jan 18 '13 at 15:45
    
Not having a SGS, I can only give general information: In settings, network/telephony. Poke around a little, somewhere there it will have a drop-down/selection box where you can chose GSM/CDMA/GSM+CDMA/auto and things like that. Make sure to select only one type here (the one you have available in most areas you walk in). You can also check for widgets to switch between 2G (GSM) / 3G (CDMA) etc., so you have it accessible easier (not sure, but doesn't the SGS3 has something like that in the notification area, on top?). –  Izzy Jan 18 '13 at 15:59

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