How much worth is cellphone in your life?

Well cellphones are very important in this digital world. If we don't have this maybe we still use mails...well if computer still exist but notebooks & even sub-notebooks are not much handy as mobile phones also they are much cheaper than laptops....I bring my mobile phone everywhere I go, In school, malls, friends house, etc. also I can keep in touch with my friends,family & love ones...also a source of information & fun like games & mobile internet....my personal organizer too that I can sync with my PC.

I am a teenager, 18 years old, and I don't even use a cellphone haha. I hate spending money, so I would rather save it up for traveling and my education, I really don't want to have a cellphone bill, when I have a phone at home I can use haha.