Is "+" sign is automatically enabled? If so then what is the reason?

[Android Central Question]

What is the use of that sign?

 

[Javier P]

What? Could you elaborate a bit more, please?

 

[Rukbat]

If you mean in phone numbers, some phone company switches use it to indicate "out of this country" numbers. Since there's no actual internationally agreed-upon format, what could look like a local number could also be a call to another country. (Think of "+" as an additional digit that everyone agrees on.)