What do these errors mean - 500 ( Internal Server) and 503 (Service Not Available)?

I've just unlocked my phone to any sim and it says limited service what does this mean

I am encountering this SMTP error: Cannot authenticate. Can anyone please tell me what this error means?

I can't log on to Aim I keep getting this error message Target rate limit reached status Detail Code 5

When I access Internet explorer it shows error "Internet Explorer has encountered a problem and needs to close. We are sorry...

My computer is reading this error but I dont understand what it means or where it comes from and how to solve it. I tried and...

Whatb dose khz in radio talk mean???

How do I get rid of limited service on my phone? Its unlocked to all networks

on msn what does this mean \\// ??

Every time I plug my ipod into the computer with the USB cord the computer has a pop up saying that there is no driver instal...

I downloaded a movie of 4 gb, I waited for like a week to see this movie but when I open it, it was only a black screen that ...