Latest Facebook Messenger 241 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; STF-L09 Build/HUAWEISTF-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 9 Honor 9
Mozilla/5.0 (Linux; Android 9; SM-A205U 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/Orca-Android;FBAV/241.0.0.17.116;] Android 9 Galaxy A20
Mozilla/5.0 (Linux; Android 9; Nokia X6 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/241.0.0.17.116;] Android 9 X6
Mozilla/5.0 (Linux; Android 9; INE-LX2 Build/HUAWEIINE-L22) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 9 Nova 3i
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/241.0.0.17.116;] Android 9 P30
Mozilla/5.0 (Linux; Android 8.1.0; itel A16 Plus Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 8 A16 Plus
Mozilla/5.0 (Linux; Android 8.1.0; CPH1909 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/93.0.4577.82 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 8 A5S
Mozilla/5.0 (Linux; Android 8.0.0; PRA-LA1 Build/HUAWEIPRA-LA1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.112 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 8 P8 Lite (2017)
Mozilla/5.0 (Linux; Android 7.1.1; MX6 Build/NMF26O; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/51.0.2074.203 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 7 MX6
Mozilla/5.0 (Linux; Android 7.0; Plume P8 Pro Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.9.116;] Android 7 Plume P8 Pro
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 10; STK-L21 Build/HUAWEISTK-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/241.0.0.17.116;] Android 10 Y9 Prime (2019)
Mozilla/5.0 (iPad; CPU OS 13_1_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/MessengerForiOS;FBAV/241.1.0.51.117;FBBV/183109993;FBDV/iPad5,3;FBMD/iPad;FBSN/iOS;FBSV/13.1.3;FBSS/2;FBID/tablet;FBLC/es_ES;FBOP/5] iPadOS 13 iPad Air 2