How do I find out my SIM number? I have a Samsung Galaxy GT-I9000 and need to find out my 20 digit SIM number somehow. 

I have been told that I should go to Settings &gt; General &gt; About to find it. 

However, it isn't! Does anybody know where this information is stored?
How about taking the SIM out and see the number printed  on its back side (the other side of the contact surface) or next to it? Just thought to say this just in case if you are not aware of!