Hi, I'm a noob. If I'm interested in saving battery, which 'network mode' should I select? WCDMA Only, GSM Only, GSM/WCDMA auto? There's more options if i do the *#*#infoH*#* thing, GSM auto (PRL), CDMA auto (PRL), CDMA Only, EvDo Only, Gsm/CDMA auto (PRL), unknown. I live in Sydney and have pretty good reception everywhere, both for calls and data. Please help, which one should I set it to? What are the implications?? Thanks!!!!