What is the most important thing to carry with you all the time?
In my opinion, smartphone is the most important thing to carry with all the time in any place. Every individual carry smartphone when they are at any place including school, college, market, office, and many more. Nowadays, individuals did not live without smartphone.

Smartphone is used in online shopping, bill payment of bills including electricity bill, telephone bill, recharge of mobile, reservation in train and bus and send ticket on our mobile, GPS, and many more. Smartphone is also used in sending professional message to our clients and bosses through WhatsApp in the professional career. It is also used in online classes, finding topics that are related to studies, preparing exams, and many more. The main use of smartphone is applying jobs and doing online jobs including content writing, and many more. Thus, each person carry smartphone in any place to talk in emergency conditions, sending urgent message to anyone, official work, work from home, and many more
I also carry smartphone in any place where it is used to talk anyone during emergency conditions. During trip, I carry smartphone that can used in taking photos and sending to our family members and close friends. In any marriage or birthday celebration, I carry smartphone to take memorable photos and send to our family members and close friends.
When I went to market, or any other place, I carry smartphone to talk with clients and boss in emergency conditions. I also carry smartphone if I go to bank because all the details banking apps are in smartphone. If I go to office then I carry smartphone for continuing contact with our boss.
Thus, smartphone is the most important thing to carry with all the time in any place.