Latest Facebook 281 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.4.2; uk-ua; HTC Desire 526G dual sim Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 4 Desire 526G Dual SIM
Mozilla/5.0 (Linux; U; Android 4.4.2; en-us; HTC Desire 526G dual sim Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 4 Desire 526G Dual SIM
Mozilla/5.0 (Linux; U; Android 4.4.2; ar-eg; HTC Desire 526G dual sim Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 4 Desire 526G Dual SIM
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7 2020 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/89.0.4389.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Blade A7 (2020)
Mozilla/5.0 (Linux; Android 9; ZTE Blade A5 2019RU 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/281.0.0.36.124;] Android 9 Blade A5 (2019)
Mozilla/5.0 (Linux; Android 9; Z3351S 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/281.0.0.36.124;] Android 9 Quest 5
Mozilla/5.0 (Linux; Android 9; W-V720-EEA Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.89 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Y80
Mozilla/5.0 (Linux; Android 9; W-V720-EEA Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Y80
Mozilla/5.0 (Linux; Android 9; VTR-L09 Build/HUAWEIVTR-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 P10
Mozilla/5.0 (Linux; Android 9; vivo 1904 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/281.0.0.36.124;] Android 9 Y12
Mozilla/5.0 (Linux; Android 9; VFD 730 Build/PKQ1.190407.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Smart V10
Mozilla/5.0 (Linux; Android 9; V1930A Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/108.0.5359.128 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Y3 Standard
Mozilla/5.0 (Linux; Android 9; TECNO KC8 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Spark 4
Mozilla/5.0 (Linux; Android 9; STK-LX1 Build/HUAWEISTK-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 P smart Z
Mozilla/5.0 (Linux; Android 9; STF-L09 Build/HUAWEISTF-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Honor 9
Mozilla/5.0 (Linux; Android 9; SM-J701F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Galaxy J7 Core
Mozilla/5.0 (Linux; Android 9; SM-J701F 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/281.0.0.36.124;] Android 9 Galaxy J7 Core
Mozilla/5.0 (Linux; Android 9; SM-J337R4 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Galaxy J3 Aura
Mozilla/5.0 (Linux; Android 9; SM-J330FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/281.0.0.36.124;] Android 9 Galaxy J3 (2017)
Mozilla/5.0 (Linux; Android 9; SM-A205GN 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/281.0.0.36.124;] Android 9 Galaxy A20