Okay, the title is a little bit of a teaser, I admit this. It's a question of getting what you asked for. I started thinking about this while traveling overseas; I turned off 3G because I didn't want to rack up data charges or perhaps there was no 3G service. As a result, I also didn't check email or maps, or browse the web. My observation? My battery went the whole day, and I still had 90% of my battery charge left. LIke the good old days of GSM and simple B&W screen Nokia phones. Except this was my beloved iPhone. I began with WA forums because of the transition from TDMA to GSM in the US. Back then we had many lively discussions O) comparing GSM vs CDMA. One of the keener observations was that the same phone model (Nokia for example) has twice (2x) the talk time on GSM as compared to the CDMA model (based on the mgfr specification data sheet). We GSM'ers were quite boastful of that. Back then we wrote of 6 hours of GSM talk time and 25 days of standby. Then I went to Japan, and slipped my GSM SIM card into a WCDMA (3G) Motorola phone. Black and White screen and I barely got through the day. Geez, a glimpse into the future for the US GSM 3G. ( in fact, today's specs are that WCDMA talk times are 1/2 of GSM times; for the iPhone that 5 hours vs 12 hours of talk time). So now GSM's WCDMA became equal to Verizon's CDMA, in terms of battery life, but I digress Then came my GSM Nokia 6131 color screen phone. Great phone, 16 million color display. I would charge every night and get 2.5 days of use out of it. Useable. And now Smartphones; gorgeous color screens, GPS, 3G, WiFI, full browsers, push and fetch email. Turn all of those things on, use them, and battery life gets pretty poor. Makes little difference if it's an iPhone, Pre, full 3G BB, etc. So we got what we asked for, higher speed for data, and we lost the great talk times we had , when we used the phone as a phone. And the solution is not carrying around spare batteries. Anyone miss that? So no, i wont go back, but I have learned battery management depending on what I expect to do that day. Mostly, I am in 3G...I get through the day just fine. But when I know that it will be a day of heavy voice phone use, with no or little data, I'll put the phone in 2G GSM mode and I'm back to great battery life. And you know what? Even checking stocks, weather, email is really not that bad on EDGE. Well, that is what most BlackBerries still do anyway. But what happens when GSM disappears completely for 3G? Or LTE? What's your opinion?