Good-Person
Captain Junkie
Security guards are not supposed to be on their smartphone for personal uses when they are on duty. It's against the code of conduct and it's liable of being sacked for. You can't be on active duty and be using your smartphone to play games or listen to music.
I have seen a video where a person (security guard) was quite busy on his smartphone. Meanwhile a person (thief) stole cash and ran away from another customer. That thief was on his motorcycle. The guard was just too busy. This is what happens when you do not focus on your job.