You have to improve your enjoyment of learning, not just with your mobile phone. If you don't play with a mobile phone, you will be attracted to other things because you don't want to learn.
The best thing is that try to cut off the social media stuff and see you would be start using les only for important stuff. This will help you save time and also the curiosity will be less to getting attracted to phone. This way you will have time to study and nothing will distract you a well.