This would be an eavesdropper.
no
i dont it depend in your understanding
Verbal communication is using your voice to communicate with others such as a phone call or just talking to someone. Nonverbal communication is communicating with others but not by using your voice such as passing notes or sending a text message.
The app that lets you call or text from someone else's number is called Spoof Call.
The app that lets you call or text from someone else's number is called Spoof Call.
Someone who often interrupts or joins conversations without being invited or welcomed is typically referred to as an "interloper" or a "meddler."
If you mean by spying that means nosy, but if you mean if someone says take out the trash to someone and they do it that is called a goody two shoes.
A critic
a troublemaker?
A person who does things for others may be an assistant or a helper.
An altruist
Hypocritical
Chauvinistic!
no
philanthropists
You could call them "arrogant" or "overbearing."
kind