I can fully understand your situation. In my opinion, you should make good use of your mobible phone. Your parents won't take your phone away if you only use it to make phone calls when necessary. But if you use it to play games or chat with your parents, it will be a waste of time and do harm your health and your study.
For the problem commmunicating with your parents. I suggest you should talk to them more often and try to understand their minds, The biggest reason for this problem is that your ways of looking at things are very different. So you should be patient to your parents and never argue with them, or the things will get even worse.
With a little hard work, you can learn to communicate better with your parents. I hope my advice can be helpful to you.