Ouch...DG17? As in, before DG27 AND DI07?
You have two options (one is easier than the other):
1) Manually update to DG27 --> DI07, then wait till DI18 comes your way (or manually update that too).
2) If you can't find the DG27 update (which my 2 seconds of googling didn't turn up), follow the links below to flash your phone to stock "DG27"
[How To] Return to Stock / Fix Bricked Epic - xda-developers
Grab Odin, the .pit file, and the full DG27 .tar file from the links on xda, then follow the directions. This is obviously much more involved, so if you want to keep all your settings (since this will wipe your phone completely), I would advise rooting, downloading Titanium Backup, backing up all programs and system data, flashing using Odin and the procedure above, then wait for the updates to get pushed, then re-root, and install Titanium backup again, and restore all. If you want to get rid of root (if you like that full-stock feeling, follow the link directly below)
http://forum.xda-developers.com/showthread.php?t=770388
The very bottom of the first post has the unrooter link
If you don't want to wait for the OTA updates, go to:
[Oct. 5, 2010] ***OFFICIAL*** SPH-D700-DI18-8Gb-REL.tar.md5 - xda-developers
for the newest DI18 .tar file.
PM/reply if you need more help
