Old 11-08-16, 03:03 PM
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Join Date: Sep 2015
Location: Atlanta
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Bikes: Trek FX 7.4 + Sirrus Expert Carbon X1

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I use "GPS Test" app to check out my GPS strength. I get 3D lock inside building. You give yours a try. I never have GPS problem on my phone. I have use Runtastic Bike Pro, Strava and MapMyRide on it and I run 2 of 3.

I am now using 520 along with the Garmin HR, speed n cadence sensor. The Garmin Edge 25 is too basic.
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