I have the gear S3 and the gear fit 2 pro (for swimming). Ive only just got the 2pro and last night I was running up and down my 3 story house along with my wife (she has an Ionic) like two *****s. My S3 and her ionic both counted 26 flights, the 2pro a big zilch, zero. So wasn't two impressed and clearly something different hardware/software between the two Samsung devices. I reset it nourmous, but no different, so left it to charge over night. Now both the S3 and the 2pro are counting flights in sync. How long will it last don't? No idea. Is it something to do with the battery level?
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