Latest Facebook 137 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z740G Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 4 Z740G
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z740 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 4 Z740
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; HTC PH39100 Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 4 PH39100
Mozilla/5.0 (Linux; Android 7.0; TA-1032 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 3
Mozilla/5.0 (Linux; Android 7.0; STARTRAIL 9 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 StarTrail 9
Mozilla/5.0 (Linux; Android 7.0; SM-G935F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 Galaxy S7 Edge
Mozilla/5.0 (Linux; Android 7.0; SM-G920P Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 Galaxy S6
Mozilla/5.0 (Linux; Android 7.0; SM-G920F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 Galaxy S6
Mozilla/5.0 (Linux; Android 7.0; SM-A510F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 Galaxy A5 (2016)
Mozilla/5.0 (Linux; Android 7.0; MI 5 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 Mi 5
Mozilla/5.0 (Linux; Android 7.0; Hisense C30 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 7 C30
Mozilla/5.0 (Linux; Android 6.0; VFD 500 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Smart Turbo 7
Mozilla/5.0 (Linux; Android 6.0; VFD 500 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Smart Turbo 7
Mozilla/5.0 (Linux; Android 6.0; VFD 500 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/49.0.2623.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Smart Turbo 7
Mozilla/5.0 (Linux; Android 6.0; VFD 300 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Smart Mini 7
Mozilla/5.0 (Linux; Android 6.0; VFD 300 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/49.0.2623.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Smart Mini 7
Mozilla/5.0 (Linux; Android 6.0; SUNNY MAX Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/54.0.2840.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Sunny
Mozilla/5.0 (Linux; Android 6.0; SUNNY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Sunny
Mozilla/5.0 (Linux; Android 6.0; SUNNY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Sunny
Mozilla/5.0 (Linux; Android 6.0; SUNNY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/137.0.0.24.91;] Android 6 Sunny