A lock picker, or a picker.
A locksmith repairs locks
i love u
locksmith
Call back and apologize for the confusion.
Someone who picks on someone else is called a bully. They are not nice people.
We call waste man who picks the waste from the road
Answers will vary based on location. In the United Kingdom the regulations on picking locks are very restrictive, but in all but three states of the U.S. it's perfectly legal for someone to buy, own and even carry lock picks even as a minor.
Such a person is a bully.
You call the landlord. If you own the place, you can give the person one month to get out of the apartment after which you can change the locks.
A locksmith typically uses tools such as lock pick sets, tension wrenches, key extractors, bump keys, and various cutting and drilling tools. They may also use technology like key cutting machines and electronic lock picking devices.
Free call services like the audio portion of Skype and Yahoo Messenger are popular picks if the quality of the call is not of importance. For free international calls, websites like Pinger offer free apps in exchange for viewing advertisements.
Call the police!