Letter of advice - mobile phone addiction

distract sb from sth

poor posture

self-discipline

academic results

have control over

time management

lack self-control

sense of accomplishment

get rid of

stay away from

mental problems

professional advice

set a limit

obtain satisfaction

anti-social

seek help from

obsession / obsessed with

isolated from others

poor posture

develop new/healthy hobbies

addictive / addicted to

socialize with others

build good habits

alleviate

face the problem