Cell phones are the biggest distraction I see for students trying to study. Every 'ring' or 'buzz' breaks one's concentration. Even if one doesn't check the text message or voicemail...just knowing it exists is enough to take the student's attention away from the subject at hand. I would recommend just turning off the cell phone and/or putting it somewhere far out of earshot while studying. You can always check who is trying to reach you when you are done. Especially when being tutored you want the time with your tutor to be uninterupted and thus most effective. So consider trying something 'radical' and letting yourself and your attention be free from your 'smart' phone while becoming smarter yourself.
Helping students succeed in math for over 10 years. Individualized attention makes the difference!