Latest Facebook 141 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z777 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 4 Z777
Mozilla/5.0 (Linux; U; Android 4.3; en-us; SCH-R530X Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 4 Galaxy S III LTE
Mozilla/5.0 (Linux; U; Android 4.0.3; en-ca; HTC-X710a Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 4 X710a
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.1; TA-1032 Build/NMF26O; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 3
Mozilla/5.0 (Linux; Android 7.0; ZTE BLADE A612 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Blade A612
Mozilla/5.0 (Linux; Android 7.0; TA-1032 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] 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/141.0.0.31.91;] Android 7 StarTrail 9
Mozilla/5.0 (Linux; Android 7.0; STARNAUTE4 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 StarNaute 4
Mozilla/5.0 (Linux; Android 7.0; STARNAUTE4 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 StarNaute 4
Mozilla/5.0 (Linux; Android 7.0; SM-J730F 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/141.0.0.31.91;] Android 7 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 7.0; SM-A520F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Galaxy A5 (2017)
Mozilla/5.0 (Linux; Android 7.0; SM-A510M Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Galaxy A5 (2016)
Mozilla/5.0 (Linux; Android 7.0; SM-A510F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Galaxy A5 (2016)
Mozilla/5.0 (Linux; Android 7.0; PRA-LX1 Build/HUAWEIPRA-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 P8 Lite (2017)
Mozilla/5.0 (Linux; Android 7.0; NOS NOVU III Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Novu III
Mozilla/5.0 (Linux; Android 7.0; NOS NOVU III Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Novu III
Mozilla/5.0 (Linux; Android 7.0; Moto G (4) Build/NPJS25.93-14-10; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 Moto G4
Mozilla/5.0 (Linux; Android 7.0; JERRY2 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/141.0.0.31.91;] Android 7 Jerry 2
Mozilla/5.0 (Linux; Android 7.0; HUAWEI VNS-L21 Build/HUAWEIVNS-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/141.0.0.31.91;] Android 7 P9 Lite