Can an iPhone be used if it's been deactivated?

Mine was lost so I deactivated it. Before it was deactivated the person left a message saying they found it and said they handed it in to the bar staff in the pub it was lost. When I arrived the staff said they knew nothing about it. I assume the person who said they would hand it in had kept it. Is it possible the taker could still use the phone even though it's been deactivated. Are their ways they can get round it? My contract provider did the deactivating etc.

17 years old, wants a verizon plan?

I'm 17 years old.
I was wanting to get a plan for an iphone 5s.
with my job i make 700$ a month, so i know id be able to pay for this phone every month.
My parents plan isn't up until september, and they think they can't let me use their line. I just wanted to know if i can even get a plan because of my age, or if it could be added to my parents even though their plan isn't up yet.

HOW TO JAILBREAK IPHONE 5C IOS 7.1.1?

I want to jailbreak my phone how can i jailbreak it? Is the jailbreak out yet? Please answer my questions.

i will give 10 stars for best answer!1

Is this a compulsion, why is the first thing people do?

Is this a compulsion, why is the first thing people do?
when they reach into their pockets and pulls out their iphones, smartphones to immediately start look at facebook, or whatever they do. Is this a unconciscous compulsion they all share.
Why do people look at their phones with their heads down when they are walking? Isn't this dangerous especially on the streets, and thieves, or burglars could easliy sneak up on you, within a few inches, and you wouldnt even know it?

Is there an app like Fake Camera for the iPod/iPhone?

A few months ago I downloaded the Fake Camera app on my android phone and used it to mess with my friends on kik, but recently I got an iPhone and was unable to download the same app! Is there any app Similar to fake camera?