How Can I Convince My Mom To Get Me A Cell Phone?

First i agree that it depends on your age.
When i wanted a cell phone what i did was asked my mum but she said no
so then the next day i told her, that with a cell phone i can contact her if i need to go somewhere and she needs to be notified, i also showed her that i was responsible

after two weeks of being mature my parents bought me a lg kp500 touch

so if you want a phone you need to show that you are responsible  and mature

Well first it depends  on your age.  If you are young I don't think you should have on. My child keeps asking for one & I won't get him one. I think that if you are old enough you need to show that your are a responsiable to have it. May be try asking for one that has min. You can buy at the store that can be added on to a phone, I know Wal-Mart has them. I'm sure you can find them at other stores.