The cell phone has become a menace. Just like many teenagers this device for communication has become a tool for entertainment. You too have become a victim of this craze. 

You have to realize that the phone has a primary use that is, to communicate. The secondary use is as an entertainment. Recreation is only after one's primary duties are done. A student's primary duty is to complete all daily studies. Now everyone can have only limited time for recreation or leisure, so allocate a time slot of forty to fifty minutes every day for leisure. You could use that time to take short breaks two or three times. 

You must have a plan to complete your daily studies. Do you have a plan or time table? I think you are playing games on the mobile to escape from work. Please draw up a time table for home work, revision, self study, recreation and so on. Then you will know the amount of work to be covered and how precious time is. So make a weekly work plan and follow it so that you don't lag behind in your assignments. 

Perhaps you are finding some part of your studies difficult and disheartened so you cannot concentrate on your studies, you can take help from YouTube solve your difficulties in my free time. Or you could find a study-buddy and work with your friend or friends. You all could work together. help each other and learn in a fun way. It may be more enjoyable and you may not need the phone to play games. 

Playing games on the phone is not healthy. Reading books, physically playing indoor or outdoor games are the more healthy activities. Reading especially, is so beneficial. You will expand your imagination; get better ideas and experiences many thrilling things through reading. You can carry on intelligent conversation when you read widely. Most of all the reading may even help your school work and studies. 

If you have a android tab or laptop, then just set a timer on it and keep it in front of you while studying. It will constantly remind you that I want to spend crucial to make some great effort which I could do for my better future .

Please do try to get away from wasting your precious time in playing games on the mobile phone and try to use your time more fruitfully. It's just a machine nothing else. Don't make it a habit such that the cellphone will control you and not you instead. I hope you will beed this suggestion before it is too late and you regret it.