. . "seven national or regional telecommunication standards organizations" . . . . "GSM & 3GPP family of standards" . . . . . . "1998" . . . . "3rd Generation Partnership Project (3GPP)" . . . "Third Generation Partnership Project" . "Third-Generation Partnership Project" . "3rd Generation Partnership Project" . "Third Generation Partnership Project (3GPP)" . "Release 15" . ".3gpp" . "3GPP" . . "CSPS" . . "3GPP" . "3GPP standards" . "3GPP Release 13" . "3GPP" . "3GPP Release 4" . . .