'HTTP_UA_OS' => null, // Reported by Verizon, Vodafone proxy system.'HTTP_X_MOBILE_GATEWAY' => null, // Seen this on HTC Sensation. SensationXE_Beats_Z715e.'HTTP_X_ATT_DEVICEID' => null, // Seen this on a HTC.'HTTP_UA_CPU' => array('matches' => array('ARM')), ...