here i am uploading a GDFS from TEMS K790i phone.
you can write it to your retail K790i flashed to TEMS firmware to activate TEMS,POCKET and GPS.
but before doing so, you must backup your phones GDFS as it will be required to write back to your phone once it is dead after writing this GDFS.
for more detail visit
http://www.finetopix.com/showthread.php?t=1949
BR
db
password is david