Cell Phone's Serial Number?

[The Squirrel]

I need my cell phone's 16 digit alphanumeric serial number for this ringtone creator program.

But everything I enter in is wrong.

So what is a cell phone's 16 digit alphanumeric serial number and where can I find it?

 

[JTIZZLEVILLE]

I pretty sure that if you take your battery out of your phone, it should be pasted on the casing (underneath where the battery would be).

 

[black_dust]

Or depending on what phone you have

*#06#

Would bring it up

 

[Abaddon]

what's the program?