Fitness Tracker Error Code 21 Fix: Why Your Steps Don’t Count Toward World Domination
Let’s be real for a second. We’ve all been pumped for a workout, only to have our fitness tracker or treadmill flash that dreaded Error Code 21. It’s like the machine decides to nap right when we’re finally motivated. Error code 21 usually means the machine isn’t getting the right speed signal, or the motor […]
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