the problem is, we don't know where to start in doing such apps... and we are looking for someone who can and understand it, we think it's a simple one....

1. buy GSM modem and add in SIM card, and code from there
2. use a gateway, required payment, may cost like 10cent in USD per message, code is easier, they would provide code to interface with them, usually they sell you a set of like 100 messages, or prepaid model,
3. use existing phone as modem, code something to talk to the phone, similiar to option 1,

mitodna

Do you need to follow everything your lecturer tells you? Tell him that SMS incurs too much cost and isn't feasible for a toy project like this. Offer to change it to email notifications. The end result is the same - customers are notified of events.