A:AnswerIt depends a lot on how they fit in your ear (your ear shape).
I have no issues with them falling out or moving around.
I do have other issues with them; disconecting and stuttering when other bluetooth devices are near (even my watch).
A:AnswerIf its charging in the case it will not be discoverable. Put both back in the case make sure they are charged and then pull them out and you'll be able to connect
A:AnswerI believe it is just the system of the buds itself.
And with it being a Samsung accessory for Iphone could be a bit of a challenge to connect. They should still work though just not very easy to get them connected. Always refresh your phone refresh the buds
Turn bluetooth on and off and on and off again to reset.