yes, but it depends on the phone company. at&t allows it while other providers do not.
No. You can only use the telephones functions. Nothing will be sent or received if there is no service. You need to connect to a service for calls to work.
just keep going to to text message and look at it
Go to message details and it should tell u there. That's how my at and t phone is.
No but you can send them through a service text4free.net
Yes