Only he can answer that.
Part of it depends on WHY he doesn't want you to have a phone. If it's just because he doesn't want to pay for it ... Since your mom's paying for it, that's not a concern. If it's because he thinks you're not responsible enough - you would need to show you are.
Of course, if your mom has visitation ... And your dad doesn't want you to have a phone ... You would have to leave it with her, and use it when visiting her.
It will depend on how you present your case. He no doubt has made a decision about your maturity. Whether he is right or wrong can be seen in how you handle other matters in your life. Does he view you as responsible? If he tells you why he is making this decision you will see how he is viewing you. Obviously you think that he is wrong. What if he is not wrong and his concerns are valid. Most parents want the very best for their children and in many cases their love and experience in life gives them an edge that you don't have at this time. If on the other hand he is wrong, here is your opportunity to show that by your response, just getting angry is the wrong response.
This is a little tricky.
Unfortunately, you have inadvertently wound up being in the middle on this one.
My suggestion would be to definitely let your dad know you want to keep the phone. But if your dad does not want you to have it, then your best bet is to tell your mother that your dad doesn't want you to have that phone and ask her to work out the issue with your dad.
The disagreements, if they continue to exist, should be worked out between the two of them. It would be better if they had agreed on the phone issue before you got it; but since they didn't, you just have to request that they work it out and accept whatever they decide.
Hope it works out for you.
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