Update from yesterday. Connected GS3 to phone to start GPS. If switch off GPS on phone GS3 stops locating. Disconnected from phone and with GPS and Wireless option on GS3 on. Next loaded GPS Reading app on watch to verify location. This app only seems to work on GPS and Wireless. On GPS only it doesn't work. Checked location on GPS Reading on Google Maps and was spot on. Started S health and started walk. GPS located after 1 min or so. Rebooted GS3 and tried S health again after starting GPS Reader app. It located again after about 1 min or so. Next tested GPS signal and tracking by keeping it running and leaving it running while out in car doing shopping. GPS on S health held signal and mapped route for at least 10 miles and also while popping in and out of car and shops. Would loose signal in shops as expected and would reaquire signal again when back outside and while in car. The general idea would he to see how long and how accurately the GS3 would hold signal. It appeared to work very well but still think it is still hit and miss with the GPS. Will keep playing with GS3 this week to see how it goes as I really want this to track my walks the way my phone does.
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Followed instructions to the letter. GPS on GS3 did not pick up. Did notice however that GPS on phone was playing up due to possible atmospheric conditions and was not zig zag track than semi perfect egg shape as I walk round a local pond at a measured distance of 1.8km. Will keep playing and fine tuning. Everything else seems ok but early days. Running S7E on Andriod 7.0
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