Latest Facebook Messenger 243 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; TECNO LB8a 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/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Pouvoir 3 Plus
Mozilla/5.0 (Linux; Android 9; SM-N950F 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/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Galaxy Note 8
Mozilla/5.0 (Linux; Android 9; SM-A505FN Build/PPR1.180610.011) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Galaxy A50
Mozilla/5.0 (Linux; Android 9; SM-A105M Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Galaxy A10
Mozilla/5.0 (Linux; Android 9; RMX1941 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/Orca-Android;FBAV/243.0.0.12.117;] Android 9 C2
Mozilla/5.0 (Linux; Android 9; Redmi 7A Build/PKQ1.190319.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Redmi 7A
Mozilla/5.0 (Linux; Android 9; ELE-L29 Build/HUAWEIELE-L2901; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 P30
Mozilla/5.0 (Linux; Android 9; BKL-L09 Build/HUAWEIBKL-L09S01; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 Honor V10
Mozilla/5.0 (Linux; Android 9; ANE-LX1 Build/HUAWEIANE-L0101; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 9 P20 Lite
Mozilla/5.0 (Linux; Android 8.1.0; CPH1853 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 8 A3s
Mozilla/5.0 (Linux; Android 7.1.2; LG K20 Plus Build/NJH47F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 7 K20 Plus
Mozilla/5.0 (Linux; Android 7.0; KOB-L09 Build/HUAWEIKOB-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 7 MediaPad T3 8
Mozilla/5.0 (Linux; Android 7.0; EVA-L19 Build/HUAWEIEVA-L19; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 7 P9
Mozilla/5.0 (Linux; Android 7.0; BAC-L03 Build/HUAWEIBAC-L03; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 7 Nova 2 Plus
Mozilla/5.0 (Linux; Android 6.0.1; vivo 1606 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.157 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 6 Y53i
Mozilla/5.0 (Linux; Android 6.0.1; SM-G532F Build/MMB29T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 6 Galaxy Grand Prime Plus
Mozilla/5.0 (Linux; Android 6.0.1; LG-M160 Build/MXB48T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 6 K4 (2017)
Mozilla/5.0 (Linux; Android 6.0.1; LG-K520 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 6 Stylus 2
Mozilla/5.0 (Linux; Android 5.1; HUAWEI TIT-AL00 Build/HUAWEITIT-AL00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.79 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 5 Y6 Pro
Mozilla/5.0 (Linux; Android 10; MAR-LX1A Build/HUAWEIMAR-L21MEB; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/243.0.0.12.117;] Android 10 P30 Lite