Okay, I have updated my S3 to JB and I see that my phone network mode is set to "Global". Is there any reason I should keep that as my default since I do not have any plans on going to another country. My other choices are "LTE/CDMA" and GSM/UMTS". Obviously since this is a Verizon phone if I were to change I would go to "LTE/CDMA". If I switch would it help the battery life?