Hello Bhavya

In this only you can help yourself .You need to control your mind and it's high time to increase your  concentration power .While studying switch off your mobile phone and if you need net for study then take your parents phone because it's not the phone that distracts but the social media . Other ways are turn off your notifications and you can also download The 'Forest' App , in this app you can set a time limit for how long you don't use your phone and if you succeed in this then a beautiful tree will grow in your digital 'forest'.Isn't it amazing!?

Moreover,if you are lazy then keep your phone in another room rather than on your studying table ,this may help as you will have to walk to the next room for the phone .There are many other causes also like hunger ,Deal with your hunger first and most importantly create a routine to stay organized.We generally use phone in order to get rid of our boredom so ,you should start taking interest in your subject and make learning fun .