We made a simple SMS application - when there is alert in a building, SMS is sent to specific range of numbers, based on the alert type. After a month we received invoice of approx. 10K € from the client, my colleague was supposed to pay
.
.
.
.
.
.
.
.
.
.
.
After checking the logs and running tests on module, we found out it was not our fault, client then told us he played with SIM-card while module was sending SMS and somehow he managed to fu*k up. I still don't get it, partially.. Mobile service provider doesn't give a sh!t about sending tons of SMS/hour? No warning, nothing..

Ahh.. Clients, right?