What's next? Pretty much anything. First off go to
www.umnet.com you can find many apps for android there. Some useful apps to google are root explorer, APN OnOff, Absolute System, AdFree, SD Speed Increase, Advanced Task Killer, Seal, Waze, Spy Phone, Extreme Call Blocker, CacheMate, Screen Shot It, App 2 SD Pro, Quadrant Standard, SetCPU, Speed Test, Terminal Emulator, Lookout, Plan B. Not all are root apps but I find them very handy and you can do a lot with them. Soon there will be custom recoveries and roms for this phone. People are working on them now so be patient it takes time. Enjoy your phone. You can change the boot animation with Abolute System and the font on your phone plus more. You can also change the boot sound on your phone with root explorer by navigating to /system/sounds/power. You can copy the name of the MetroPCS_PowerOn.mp3 file to a song or sound clip that you like and rename the original file to mp3old so you still have it on the phone and copy the new sound with the changed name above to this folder and you will have a custom boot sound. Make sure when you are in root explorer and in the power folder to click the Mount R/W button on the top right so that you can rename and copy the new file in.