15 years old, not allowed cellphone.?

[Rgirl]

So, I'm a teenager. My dad will not let me get a cellphone, I even said to him I would pay for it the cellphone, and it's monthly fees myself. I'm the only kid I know who doesn't have one. I'm more of a social outcast because of it. And I'm also not allowed facebook. He believes if I get a cellphone, I'll be on it 24/7, I won't be aware of my surroundings outside, and I'll be isolated from the family. Although I do see this as true, many kids, and even adults are glued to their phones.(Also, he sees it pefectly fine for me to be glued to the computer all day -_-.) I know that I won't be on it 24/7, cause I've never been like that, and I know how angry it makes my dad. It would be nice to contact my friends, without having an awkward phone convo with them "um, hi, so what are you doing, yah, cool, so...yah." Thats usually how it goes when I'm on the phone, we run out of things to think of and speak about. I find with texting, its more engaging, without having an awkward silence. And it doesn't burn up the phone bill, and I can talk to them from whenever, not just after school, when my friends and I are at home.
A cellphone would also be nice to have during emergencies too, I'm always afraid that I'll be stuck in the middle of no where for whatever reason, and not be able to do anything.
He said there is no way he is " paying for those Fu***** things". So I said I would, then he said, I don't have a job, but I'm planning on getting a job, so I can pay for everything. So...
-How to convince him? (He's a hard man to convince of anything, when he has an opinion he sticks to it, and gets mad at anyone who thinks differently, and doesn't do as he says.)
-Could I get a job at 15? If so what, maybe dishwasher?