Latest Facebook 257 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; VTR-L29 Build/HUAWEIVTR-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 P10
Mozilla/5.0 (Linux; Android 9; V1928A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/97.0.4692.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 U3X
Mozilla/5.0 (Linux; Android 9; TECNO LB8a 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/257.0.0.44.118;] Android 9 Pouvoir 3 Plus
Mozilla/5.0 (Linux; Android 9; TA-1053 Build/PKQ1.181105.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 5
Mozilla/5.0 (Linux; Android 9; STK-LX1 Build/HONORSTK-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 P smart Z
Mozilla/5.0 (Linux; Android 9; SM-T295 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy Tab A 8.0" (2019) LTE
Mozilla/5.0 (Linux; Android 9; SM-T295 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/130.0.6723.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy Tab A 8.0" (2019) LTE
Mozilla/5.0 (Linux; Android 9; SM-S367VL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J3 Orbit
Mozilla/5.0 (Linux; Android 9; SM-N950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy Note 8
Mozilla/5.0 (Linux; Android 9; SM-J810F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J8
Mozilla/5.0 (Linux; Android 9; SM-J737R4 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J730F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 9; SM-J701F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J7 Core
Mozilla/5.0 (Linux; Android 9; SM-J600FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J6
Mozilla/5.0 (Linux; Android 9; SM-J530FM Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-J530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-J530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-J400F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J4
Mozilla/5.0 (Linux; Android 9; SM-J330FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/257.0.0.44.118;] Android 9 Galaxy J3 (2017)
Mozilla/5.0 (Linux; Android 9; SM-J260AZ 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/257.0.0.44.118;] Android 9 Galaxy J2 Pure