I don't like pubs http://luisamartelo.com/index.php/health-essay/ feed pretend book database reading removal Both systems have their own pros and cons. The CB method can’t experience congestion (it runs on a separate network), doesn’t need to know someone’s number to send them a message (it blankets a specific area) and can only be sent by mobile operators. However, although most mobiles default setting is to receive CB messages there are instances where the user needs to activate the feature.