Which is your favorite gadget?

My favorite gadget is a newly upgraded smartphone. Actually, I use it when I want to do my business profession. I am afraid of unforeseen online events and programs such as viruses and notorious programs which may potentially harm my financial activities when they corrupt my normal and ordinary internet activities.

Assuming that I can not use my smartphone every day, therefore, I should take my laptop and desktop computer wherever I go and it really makes a lot of difficulties and inconveniences for me. However, this new smartphone provides me enough facilities to communicate with those people I am responsible for them along with my profession. :)