I found a great "how to" manual to connect Garmin ANT devices to Android devices without build-in ANT. It's possible to use with original Garmin ANT USB2 stick. I tested it on devices with Android 4.0, 4.1.x and 4.2.x. It is possible to use on Android v4.1 and newer...
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Road: nuvi 255w - - - Trail: Oregon 600 & fenix 2
Accessories: HRM, Tempe, foot pod