thank you. I finally got it to open by installing a tethering app, however, was not successful at rooting this phone tried both Mac an windows, same problems everyone else has, sd card not mounting, switched over to TWRP recovery, allows me to load zip file, but gets a signature error and I never end up with root. About ready to give up, and go back to my Evo 4G which I rooted and had the wifi hot spot working. Whatever they did in this last build, they don't want there phone rooted at all.
So, unfortunately, some info, particularly with regards to rooting, has become outdated on these forums. Try this:
1. Download either TWRP 2.6.3.0 .tar file or Philz Touch 6.0.0.8 .tar file to your computer; I am currently recommending Philz
2. Download latest SuperSU update .zip file (version 1.80 as of this writing, download version 1.75 while you are at it, will explain why later)
3. Download Samsung drivers to your computer so it will recognize your phone when you plug it in with USB; downloading Kies will install the drivers as well, and then Kies itself can be uninstalled afterward (I find it to be a pretty useless program in general, and 100% worthless if you are rooted)
4. Download Odin version 3.07 to your computer
5. Plug in phone with USB, and transfer SuperSU .zip file to the phone, internal or external memory doesn't matter, as long as you know where to look for it
6. Place phone into download mode (volume down, home key, power button all at same time, wait through the vibrate until message appears on screen), then open Odin v. 3.07, uncheck "auto reboot" and then click button labelled "PDA" and then browse to the file location for the recovery .tar file you downloaded (I just put them on the desktop for ease of locating); select that file and it will show up in the dialog box next to the PDA button
7. Press "Start" and about two minutes later Odin will give you a "Pass" message
8. Unplug USB, and then remove battery from your phone (holding down power button until phone shuts off generally does the same thing, but battery pull is recommended method); replace battery after about 5-10 seconds, then hold down, at the same time, Volume Up, home key, and Power button, keep holding until
after the phone vibrates and blue script appears in top left corner saying "Recovery booting"
9. Navigate to location of .zip file containing SuperSU and flash that file
10. Reboot, and you should now be rooted. There are several Root Checker apps available in Play Store that can be run after reboot to confirm root status. Alternatively, open Titanium Backup and it will let you know if you are rooted or not
So the reason for wanting both SuperSU files is that sometimes you need to let Play Store update SuperSU for you in order to achieve root. If this is the case, flash the next to most recent version, and then Play Store will detect a need for an update and take care of it for you.
Hope this helps and good luck!
Links:
Philz Touch:
http://forum.xda-developers.com/showthread.php?t=2446393
TWRP:
http://techerrata.com/browse/twrp2/d2spr; version 2.6.3.0 should work fine, version 2.6.3.1 wouldn't mount anything for me and was really buggy, couldn't get it to work
SuperSU:
http://download.chainfire.eu/370/SuperSU/UPDATE-SuperSU-v1.80.zip
Remember, d2spr means "Sprint" and that is what VM and Boost piggyback from!