[Phanuthier]

I'll take my half-assed, non-professional stab at it since even photon doesn't know.

When you send a text, I believe you send the following info:
(flag request to transfer data... data transfer begin, address of destination, MESSAGE, end data transfer)

Inside of address of destination, it is of coarse sent in some binary code (1011) from your cell phone antenna to a cell phone base station. During transfer, there are sometimes environmental factors that cause bit errors, so instead of sending 1011, you might end up sending 1010. I think the bit error rate most cell phone makers target for is 1/1000.