Latest Facebook 251 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; Z4_EEA Build/PPR2.181005.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/114.0.5735.130 Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 MatrixPad Z4
Mozilla/5.0 (Linux; Android 9; YAL-L21 Build/HUAWEIYAL-L71; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Honor 20
Mozilla/5.0 (Linux; Android 9; Y8 Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Y8
Mozilla/5.0 (Linux; Android 9; VOG-L04 Build/HUAWEIVOG-L04; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 P30 Pro
Mozilla/5.0 (Linux; Android 9; vivo 1904 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Y12
Mozilla/5.0 (Linux; Android 9; V1930A Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/114.0.5735.196 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Y3 Standard
Mozilla/5.0 (Linux; Android 9; TECNO AB7 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Phantom 9
Mozilla/5.0 (Linux; Android 9; STK-TL00 Build/HUAWEISTK-TL00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Enjoy 10 Plus
Mozilla/5.0 (Linux; Android 9; STK-LX3 Build/HUAWEISTK-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Y9 Prime (2019)
Mozilla/5.0 (Linux; Android 9; SNE-LX3 Build/HUAWEISNE-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Mate 20 Lite
Mozilla/5.0 (Linux; Android 9; SNE-LX3 Build/HUAWEISNE-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Mate 20 Lite
Mozilla/5.0 (Linux; Android 9; SM-S767VL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J7 Crown
Mozilla/5.0 (Linux; Android 9; SM-S757BL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J7 Crown
Mozilla/5.0 (Linux; Android 9; SM-S367VL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J3 Orbit
Mozilla/5.0 (Linux; Android 9; SM-S357BL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J3 Orbit
Mozilla/5.0 (Linux; Android 9; SM-S102DL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy A10e
Mozilla/5.0 (Linux; Android 9; SM-N960U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy Note 9
Mozilla/5.0 (Linux; Android 9; SM-N950U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy Note 8
Mozilla/5.0 (Linux; Android 9; SM-J737V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J737T1 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/251.0.0.31.111;] Android 9 Galaxy J7 (2018)