2 ms·Smartphones and tablets in bedrooms disrupt sleep even when switched off2 points by spking 10y agomarkoo 10y agoPro tip: if you use your smartphone to wake you. Get a fitbit or similar that can gently vibrate to wake you and leave the phone outside the bedroom. I've been doing this for over a year now and sleep a lot better.spking 10y agoI do this too. A fitbit one that also gives you the time.