Yes they can but you need to enable this feature first. To enable SMS Subscription Service do the following:
- From the Account Menu select the Misc. Settings option.
- Go to the SMS Subscription section.
- Enter the SMS Subscription ID you wish to use. This should be something short and identify you or your business. This is what your customers will use when subscribing/unsubscribing to your SMS Text Messages.
- Click the Enable SMS Subscriptions.
- Save your settings.
Once you have this done, you can tell your customers if they want to subscribe to your SMS Text Messages they can send subscribe <Your SMS Subscription ID> to (854) 777-0603 to subscribe.Tags: SMS