A:AnswerYou will have to contact Fitbit to resolve the problem as I had to do with my Fitbit Inspire which stopped working after two weeks. They said to bring back to Best Buy for another one, which I did and we ended up purchasing the Charge 3
A:AnswerThe Fitbit is compatible with the LG V40 since it runs on android operating system, I use my with the google pixel 2 xl and have had no problems. Just download the Fitbit app and sign up for a Fitbit account if you don’t have one and it walks you through pairing your Fitbit.
A:AnswerYou need to put the fitbit charge 3 back on the charger and hold the left side button for 8 seconds release it, then it will show a happy face like emoji and it will do a soft reset. And then it will fix that issue. I had that one time and that's what I was told to do it and it fixed the problem, same as you had.
A:Answerthey come with two size options only. both are included with the purchase of the fitbit charge 3, not sure about the other models, you just switch the band that works according to your wrist size..Best buy had a sizing line at there fitbit display to give you an idea of which band would work for your wrist circumference.