Hello,
Our school wants to send out emergency school closing messages to it's students via cellphone txt messages. But it seems that to send out sms from a server we need the msisdn cell phone number(the whole 15 digits) of a student.
My question is how can we get this phone number? Should we ask the students to send us a sms first? Will this give us their msisdn number?
Or is there another way to figure out the msisdn number from the regular number? Thanks in advance.