First off, I didn't "find" this method on my own someone else did, I found it burred in other posts but it does seem to work for me. There are two ways to do this. One required you to dial a code into your dialer which I'll skip because the easy way is to just go to the Apps Market and get "Network" which is free. Then once you have it installed fire it up and scroll to the very bottom where you will see: Set preferred network type. This is the VERY top option. If this is your first time running "Network" it's probably set to "GSM auto (PRL)". The problem here I've read is that Sprint does not have GSM networks so the phone keeps "searching" for GSM signals and it never truly sleeps. It might apprear to be sleeping but it's not, it looking for GSM signals. That said, change the setting to "CDMA auto (PRL)" which will set the phone to CDMA only and it will STOP looking for GSM networks and to go sleep like it's suppose to. That's if you have nothing else installed keeping it from sleeping. The only catch is, the setting does not appear to stick. If you reboot the phone, you have to restart "Network" and redo the setting. One thing to note is when you redo the setting, it will SAY it's still set to CDMA auto (PRL) but in fact it is not so just re-select the setting and close out of Network. I took my phone off the charger at 10am this morning and I've been using it on and off all day to send texts, Youtubed a couple video's made a 30+ minute call and a few other odds and ends. Normally I would have had to charge my phone again at least once threw out the day but I've NOT put it back on the charge since 10am and I was still at 83% power when I left work at 5pm. I'm at 53% power now, it's 11:20pm, I've watched more Youtube, made 3 15 minute'ish calls texted about 10 times and played a game for about 20 minutes. I would have had my phone on the charger a 3rd time for a hour or so by now doing all this so its gotta be helping. My phone was bleeding about 10~15% power per hour'ish or so just sitting in my pocket before this. I could take my phone off the charger and at 10am and by lunch at 2~3pm, I was lucky to have 50+% power left if that if I only checked my texts or email maybe once or twice without calls. Thanks to the guys who figured this out.