I upgraded from a FitBit Charge HR to a ForeRunner 735XT (called "ForeAthlete 735XT J" in Japan to confuse us) and I have one big problem: the vibration-only mode is weak and terribly noisy.
The ForeRunner 735XT's vibration-only mode is so noisy it cannot be called a "silent alarm". And it's not even strong at all.
I'm forced to enable the "do not disturb" mode when I'm at work to not annoy my colleagues, making that feature pretty useless (luckily, there's a Do Not Disturb mode, but we shouldn't need that mode).
The FitBit Charge HR's vibration was stronger (strong enough to wake me up) and much less noisy (inaudible for my partner next to me or my colleagues at work).
Can it be fixed with a software/firmware update?