On Fri, 2016-06-17 at 10:02 -0400, bruce wrote:
Here's my use case.
Master process sends out msgs to 5 people, 'hey, gret deal' 1st 100 people get it for price X"
The 5 people then send the msgs to their friends, who in turn send to their friends, etc..
Sounds awfully like you want to spam people.
I suspect you need a cell phone that acts as a modem, and allows you to send SMSs through it. Businesses and schools do this kind of thing, but probably most would do it by paying for a gateway provider, for things like automatically sending reminds for dental appointments, and other alerts. They send it to the gateway provider, it puts it through the mobile phone network.