Letter of advice - mobile phone addiction

self-discipline

anti-social

alleviate

develop new/healthy hobbies

professional advice

poor posture

seek help from

academic results

socialize with others

get rid of

lack self-control

poor posture

build good habits

sense of accomplishment

isolated from others

set a limit

distract sb from sth

mental problems

time management

obsession / obsessed with

obtain satisfaction

face the problem

have control over

addictive / addicted to

stay away from