Original sentence: 7 layers inc.CTIA: CTIA - The Wireless Association.FCC (Federal Communications Commission): an independent United States government agency, directly responsible to Congress.GCF: Global Certification Forum (GCF) is a 2G/3G testing certification body similar to PTCRB and initiated primarily by European Operators and Mobile Vendors.PTCRB accredited laboratories.To learn more about device certifications, please visit PTCRB Official Website.W-CDMA: the technology on which UMTS is based.You must sign up as a member to gain access
Edited sentence: CTIA - The Wireless Association.Federal Communications Commission