Comment by fy20

A while ago I worked on an SMS gateway and somebody had entered their own phone number in some sort of test. Somebody tested it, and there was a bug which triggered 100s of messages to be sent to their phone.

This was over a decade ago, when the messages were stored on the SIM and there was a limit as to how many they could hold (something like 20). So you just fill up the limit and that's it right? Nope, the carrier helpfully buffers messages that can't be received, and they will be sent/received when there is space on the device. I can't remember how they resolved it in the end, I guess just waiting for the messages to expire (72 hours).