Latest Facebook Messenger 259 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; SM-G960U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy S9
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 9; SM-A750FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy A7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-A705FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy A70
Mozilla/5.0 (Linux; Android 9; SM-A205U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy A20
Mozilla/5.0 (Linux; Android 9; SM-A202F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Galaxy A20e
Mozilla/5.0 (Linux; Android 9; RMX1911 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 5
Mozilla/5.0 (Linux; Android 9; Redmi Note 8T Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Redmi Note 8T
Mozilla/5.0 (Linux; Android 9; Redmi 8A Build/PKQ1.190319.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Redmi 8A
Mozilla/5.0 (Linux; Android 9; ONEPLUS A5010 Build/PKQ1.180716.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 5T
Mozilla/5.0 (Linux; Android 9; Mi A1 Build/PKQ1.180917.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Mi A1
Mozilla/5.0 (Linux; Android 9; LG-H930 Build/PKQ1.190414.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 V30
Mozilla/5.0 (Linux; Android 9; JKM-LX2 Build/HUAWEIJKM-LX2; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Y9 (2019)
Mozilla/5.0 (Linux; Android 9; INE-LX1r Build/HUAWEIINE-LX1r; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 Nova 3i
Mozilla/5.0 (Linux; Android 9; EML-L29 Build/HUAWEIEML-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 9 P20
Mozilla/5.0 (Linux; Android 8.1.0; SM-G610F Build/M1AJQ; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/75.0.3770.101 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 8 Galaxy J7 Prime
Mozilla/5.0 (Linux; Android 8.1.0; Redmi 6 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 8 Redmi 6
Mozilla/5.0 (Linux; Android 8.1.0; Redmi 5 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 8 Redmi 5
Mozilla/5.0 (Linux; Android 8.0.0; SM-G935F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 8 Galaxy S7 Edge
Mozilla/5.0 (Linux; Android 8.0.0; SM-G935F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/259.0.0.18.120;] Android 8 Galaxy S7 Edge