Latest Facebook 291 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; Z6621O 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/291.0.0.44.120;] Android 9 Optus X Vista
Mozilla/5.0 (Linux; Android 9; Y9Plus Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/85.0.4183.127 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Y9 Plus
Mozilla/5.0 (Linux; Android 9; Xperia XZ1 Build/47.2.A.11.228; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/85.0.4183.127 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Xperia XZ1
Mozilla/5.0 (Linux; Android 9; X20 PRO Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/85.0.4183.127 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 X20 Pro
Mozilla/5.0 (Linux; Android 9; VTR-L29 Build/HUAWEIVTR-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 P10
Mozilla/5.0 (Linux; Android 9; VKY-L09 Build/HUAWEIVKY-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 P10 Plus
Mozilla/5.0 (Linux; Android 9; vivo 2010 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.75 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 2010
Mozilla/5.0 (Linux; Android 9; vivo 2010 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/85.0.4183.120 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 2010
Mozilla/5.0 (Linux; Android 9; vivo 1916 Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 U10
Mozilla/5.0 (Linux; Android 9; V1930A Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Y3 Standard
Mozilla/5.0 (Linux; Android 9; V1928A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 U3X
Mozilla/5.0 (Linux; Android 9; V1901A Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/105.0.5195.79 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Y3
Mozilla/5.0 (Linux; Android 9; V1813BA Build/PKQ1.181030.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Z3
Mozilla/5.0 (Linux; Android 9; TECNO KC8 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.185 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Spark 4
Mozilla/5.0 (Linux; Android 9; TECNO BB4k Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Spark 4 Lite
Mozilla/5.0 (Linux; Android 9; TBBVNC100005208 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.125 Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 TBBVNC100005208
Mozilla/5.0 (Linux; Android 9; STF-L09S Build/HUAWEISTF-L09S; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.75 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Honor 9
Mozilla/5.0 (Linux; Android 9; SPC GEN LITE Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Gen Lite
Mozilla/5.0 (Linux; Android 9; SM-S767VL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] 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/86.0.4240.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/291.0.0.44.120;] Android 9 Galaxy J3 Orbit