32. Most cell phones can dial the local emergency number when they’re locked, even without a SIM card.
Of course I believe, everyone know this. You can call 911 without service or a SIM card on most cell phones.
31. Don’t use a cell phone while walking
Combining walking and using your cell phone is too big a challenge for the brain. This can cause you to lose track of your surroundings, becoming blind to any possible dangers (such as a speeding car that might suddenly come your way).
