HTC EVO Battery Life Solution! I found this hack and it has really been useful

Those of you with an HTC EVO on the Sprint network may have noticed that your phone’s battery life is terrible. In fact, that is probably why you have landed on this page. If you’re like me, you’ve tried almost everything to increase battery life so that you can still make a phone call after you’ve sent a couple of texts AND watched a quick YouTube video. Running Task Killers, disabling WiFi, Bluetooth, and GPS, even underclocking the CPU didn’t seem to help me much.

Then I came across a tip that really made a difference for me, so I thought I’d share it with all of you. The problem is that the EVO seems to be configured to look for the GSM and CDMA network types, when in reality it only needs CDMA (Sprint’s network is CDMA only).

This is what I did:

A simple setup is all that is needed. – Open your phone application as if you were going to make a call by dialing a number.

– Dial * # * # 4636 # * # * (That’s star, pound, star, pound, four, six, three, six, pound, star, pound, star).

– It should be taken immediately to a menu called “Test”.

– Select “Phone Information” and scroll down to the bottom of the “Phone Information” screen.

– The first option on this screen says “Set preferred network type:”, make sure it is set to Automatic CDMA (PRL).

That’s! You may need to restart your phone before it takes effect. I made this change and I typically see 15-20 hours of life if I use the phone regularly throughout the day. Enjoy!

UPDATE: I just read that there is an app called Red that takes you to this same window without having to dial the code mentioned above. You can search for it in the market or use the QR code below from your phone.