Chosen Solution

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Gear Sport, Blue’’’ MODEL NUMBER: SM-R600SERIAL The black tap on black is gone. Need a replacement? Can anyone fix or can I order this part? Thx

This is the only replacement that I could find. https://rounded.com/samsung-gear-sport-s… If you do not have one, you will need a tri-wing screw driver. You will also need a splunger or a guitar pick or playing card to pry the back open once you remove the screws. Here is a simple tear down guide for the Samsung Gear Sport. Hope this helps. Good luck.