Associations often provide free information available to the public. However, one often has to be a member in order to fully access the information provided on their websites.
This is an association for the "mobile marketing ecosystem including brand marketers, agencies, mobile technology platforms, media companies, operators and others." Some reports are available when you register.
This "is an international nonprofit membership organization that has represented the wireless communications industry since 1984. Membership in the association includes wireless carriers and their suppliers, as well as providers and manufacturers of wireless data services and products.
This association represents licensed mobile network operators globally as well as those in the broader mobile ecosystem, including handset and device makers.
CTA is an advocate "for the entrepreneurs, technologists and innovators who mold the future of the consumer technology industry. CTA provides a platform that unites technology leaders to connect and collaborate, and it avidly supports members who push the boundaries to propel consumer technology forward."