[KIOWA69]

well i dont use sprint nav, but the first things i do is run quick gps and then use google maps to make sure it's picking up my location and then i make sure the weather is getting my location right and i never have had any issues. also update your prl and radio if you can, like i stated earlier if you flash to the sprint 6.5 rom it will update your radio and prl to the newest one, then you can flash to a custom rom and it will keep the new radio and prl.