Should Motion Data on Lumias be turned off for those using Band 2? I assume there is no benefit running both and it would save some battery on a phone? I also assume, for those that want to run both, there is no risk of the results getting duplicated in a final tally when you carry both? I can see a benefit if they somehow complement each other, eg. Band in charging while I'm walking around my house and backyard with just my phone. Does it add the Motion Data steps to MS Health app only when Band does not provide it? Basically the question is how do Band 2, Motion Data and MS Health cooperate?