The key phrase in your question is, "give me." A parent's responsibility is to provide food, shelter and an education to their children. They're not obligated to provide you with a means for communicating with your friends.
There's nothing wrong with your getting a job and buying yourself a phone but ask yourself this: "Twenty years from now, will I be better off if I spent this time learning what I need to know to get through life or talking on the phone?"
The fact is, twenty years from now, the kids with phones will be working for the ones that spent their time learning.