Latest Facebook 277 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7 2019 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Blade A7 (2019)
Mozilla/5.0 (Linux; Android 9; VKY-L09 Build/HUAWEIVKY-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] 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/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 2010
Mozilla/5.0 (Linux; Android 9; VFD 630 Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.114 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Smart N10
Mozilla/5.0 (Linux; Android 9; U304AA Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Radiant Core
Mozilla/5.0 (Linux; Android 9; TECNO LB8a 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/277.0.0.41.126;] Android 9 Pouvoir 3 Plus
Mozilla/5.0 (Linux; Android 9; SNE-LX3 Build/HUAWEISNE-L03; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Mate 20 Lite
Mozilla/5.0 (Linux; Android 9; SM-S260DL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Galaxy J2 Core
Mozilla/5.0 (Linux; Android 9; SM-A530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.198 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Galaxy A8
Mozilla/5.0 (Linux; Android 9; SM-A102U1 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Galaxy A10e
Mozilla/5.0 (Linux; Android 9; RX7 Mini 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/277.0.0.41.126;] Android 9 RX7 Mini
Mozilla/5.0 (Linux; Android 9; RMX1825 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 3
Mozilla/5.0 (Linux; Android 9; RMX1805 Build/PKQ1.190319.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 2
Mozilla/5.0 (Linux; Android 9; REVVLRY Build/PCY29.148-56-8; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.89 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 REVVL Plus
Mozilla/5.0 (Linux; Android 9; REVVLRY Build/PCY29.148-154; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 REVVL Plus
Mozilla/5.0 (Linux; Android 9; Redmi Note 8 Pro Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Redmi Note 8 Pro
Mozilla/5.0 (Linux; Android 9; Redmi Note 5 Build/PKQ1.180904.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.79 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Redmi Note 5
Mozilla/5.0 (Linux; Android 9; PMT4238_4G_EEA Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Q Pro
Mozilla/5.0 (Linux; Android 9; PAR-TL20 Build/HUAWEIPAR-TL20; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Nova 3
Mozilla/5.0 (Linux; Android 9; PAR-LX9 Build/HUAWEIPAR-LX9; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.198 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/277.0.0.41.126;] Android 9 Nova 3