But after a while it completely loses lock on all satellites. Tried toggling GPS on/off, re-loading ephemeris data using GPS Status, etc., and nothing seems to work except rebooting.
GPS Status' commands to clear assistance data and to "downland" assistance data have never worked on on Epic and don't now. It works on most handsets but not Samsungs method of caching assistance date (ephemeris and almanac). The developer of GPS status has confirmed this.
You are experiencing classic symptoms of intermitant inability to refresh GPS assistance cache, a bug which Samsung is famous for, which has plagued the Epic, and I am testing and preliminarily finding I have this also on EC05.
And you are correct, samsung since EB13 has disabled our prior published ability to force cold starts on epic, a working workaround giving GPS acquisition in 10 seconds 100% of the time for me. I am also rebooting for the moment.
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