wow. thanks for your information. i don't have an SD card or use vibration feature. i am very meticulous when it comes to my phone. it worked flawless before, just until this month.
Well mine is less then month old worked flawless till today lol
A couple days of Note 4 in front jeans pocket putting stress on frame made the magic happen.
With GPS Test app enabled I Took back cover off , applied minor pressure on antenna area & bingo lock achieved 15 of 18 in use
Releasing pressure provided 0 of 18 lock lost.
Shame on Samsung for such pathetic assembly!!
The temp temp fix was backing out a couple screws in antenna area then giving them good tighten.
I will do take apart in coming days making true fix.
UPDATE:
Well the temp temp fix used has made GPS lock faster & stronger then ever.
Testing inside my home provides 10 feet accuracy within 15 seconds using GPS Test app
Signal stays firm much less transponder drop.
This fix wont last long contact points will weaken again
Once again SHAME ON SAMSUNG!