Samsung Moment

My only complaint its the battery life, but it can be manageable with some tweaking though...like turning off background data, keeping the screen dim, using a task manager/app killer, having a car charger or the micro usb cable (for charging via usb) handy.

If you feel like rooting you can underclock it to save juice, also removing the sprint bloatware helps too.

Overall its a great phone, I am happy I got it. Its the best phone sprint has to offer currently in my opinion.