Subscriptions-SMS help Do I have to use my credit card to sign-up for the SMS service? What happens if I change my mobile number? Can I register for more than one club alert service at a time? How can I change my SMS alert preferences? How do I unsubscribe from the SMS service? How much does the official SMS service cost? Website SMS Subscribers What do you mean when you say this is the club's official SMS service? What networks is the SMS service available on? Will you use my mobile number for anything else other than to send SMS alerts?