Here´s how to promote a role to your crew by sms or push....
a) Select which role you want to promote
b) Open up the "Promote" tab
c) Select "Notify workfroce about this role"
d) Choose criteria for who the message should go to. eg Only Crew matching all skills. (Estimated reach will update letting you know how many crew will receive the message)
e) Select if you want to send as a Push or SMS
f) Add an internal reference and any additional info to the sms
g) Press "Send"
h) You´ll get one last warning letting you know how many messages will be sent