I've had my S4 (GPS + LTE) for 5 days, and I've done 4 races with it. The last race I did was off for a quarter of a tenth. I leave my phone in my car, but the starting point for my driving is near my car and I run back around (total loop is .61 miles) to start over. Is my clock connected to my station, which is desktop, and uses its GPS position when I'm near my car and that is what causes the inconsistency? Any help will be appreciated because I can not find anything.