Hi,
I've got my second MS Band 2 nearly 2 weeks ago and unfortunately it seems to be not working correctly. I replaced my first Band 2 after 1 week because its battery life was terrible (charged 100% in before going to bad, sleep tracking, morning workout tracking 1.5h and it was dead short after that), charging took very long (1,5h to 80%, 2h to 99%, 4h to 100%) and HR sensor was defective (always in acquiring mode) and inaccurate.
I've done some tests of my second Band 2. The battery life is ok now but here are some serious bugs I've found:
1) HR sensor seems to be defective again. When I randomly turn the screen on it's almost always in acquiring mode (empty heart icon). I've noticed that only after I put it on my wrist it goes from acquiring to locked (full heart icon) but after a short while it's in acquiring again. When I'm tracking an exercise (bike ride, workout, etc.) it's locked for a while and then it goes to acquiring and so on. And it's really inaccurate.
2) HR sensor is inaccurate. When I don't track any exercise it barely goes higher than normal even though I'm actually doing an exercise! And when I have a lazy day at work and I turn on exercise tracking for a whole day it shows some very high calories burning! Here are some proofs:
This is how my normal workout day looks like. I wear my Band 2 and when I work out I turn on workout tracking (Strength).
This is how my non-workout day look like. I didn't track any exercise. On this particular day I woke up, took a bike to work (10 min), worked for 8h, took a bike home (10 min) and played my console. Notice that the band didn't register any extra calorie burning and elevated heart rate when I was riding a bike!
This is how it registers a bike ride when I actually turn on bike tracking.
This is my workout day. The time of the workout was exactly the same as on my first screenshot. This time I didn't turn on any tracking. The Band 2 was just on my wrist the whole day. Notice that the Band 2 registered very minimal extra calorie burning.
This time I woke up, charged the device, immediately started the workout tracking app and turned the screen off so it can last the whole day. During the day I had a football game but notice how different was the calorie counting comparing to when the Band 2 is on idle.
This time I also woke up and started the workout tracking app right away. Than I was driving a car for nearly 8h (over 600 km). The band registered some very unusual calorie burning and it also registered a lot of steps I didn't even do!
This is the next day. The Band 2 was idle for the whole day. I was driving for 3 hours and I was on my friend's wedding in the evening (so a lot of dancing). Look how much different it is!
In this test Band 2 on idle. I was driving a car for 8h (over 600 km, the same route as before, I was going back). Look how much different it is.
As you can see, the HR monitoring and calorie burning is totally unreliable.
3) Facebook Messenger app is sending unnecessary notifications. When I'm using my phone and I open a chat on Facebook Messenger, my Band 2 is vibrating and displays the following notification "Chat heads active". When I receive a message it vibrates but instead of displaying the message it displays "Chat heads active". As far as I remember such problem didn't occur on my previous Band 2 (the one I replaced with my current one) so now I'm not sure it's because my current Band 2 is defective or is it because of some software update that came in the meantime.
4) Floor counting is not working properly. E.g. I took 3 floors and it counted only 1.
So these are the bugs that occurs to me. Bug number 2) makes the Band 2 totally unusable for me as proper HR monitoring and calories counting was the reason I bought this device in the first place. My questions is: should I try to replace the device one more time because it should work the other way or is it just the way it works?
Thanks in advance for any help.