Latest Facebook Messenger 261 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; VTR-L09 Build/HUAWEIVTR-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 P10
Mozilla/5.0 (Linux; Android 9; STK-LX1 Build/HONORSTK-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 P smart Z
Mozilla/5.0 (Linux; Android 9; SNE-LX1 Build/HUAWEISNE-L01; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Mate 20 Lite
Mozilla/5.0 (Linux; Android 9; SM-J730GM Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 9; SM-J730F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 9; SM-J730F 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/261.0.0.21.119;] Android 9 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 9; SM-J600FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy J6
Mozilla/5.0 (Linux; Android 9; SM-J330FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy J3 (2017)
Mozilla/5.0 (Linux; Android 9; SM-A505FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy A50
Mozilla/5.0 (Linux; Android 9; SM-A205U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy A20
Mozilla/5.0 (Linux; Android 9; SM-A105FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Galaxy A10
Mozilla/5.0 (Linux; Android 9; SM-A105FN 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/261.0.0.21.11 Android 9 Galaxy A10
Mozilla/5.0 (Linux; Android 9; RMX1919 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 5
Mozilla/5.0 (Linux; Android 9; Redmi Note 8 Build/PKQ1.190616.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Redmi Note 8
Mozilla/5.0 (Linux; Android 9; Redmi Note 7 Build/PKQ1.180904.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Redmi Note 7
Mozilla/5.0 (Linux; Android 9; Redmi Note 5 Build/PKQ1.180904.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Redmi Note 5
Mozilla/5.0 (Linux; Android 9; Redmi 6A Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Redmi 6A
Mozilla/5.0 (Linux; Android 9; POT-LX3 Build/HUAWEIPOT-L03; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 P smart (2019)
Mozilla/5.0 (Linux; Android 9; Mi Note 10 Build/PKQ1.190302.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Mi Note 10
Mozilla/5.0 (Linux; Android 9; Mi A1 Build/PKQ1.180917.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/261.0.0.21.119;] Android 9 Mi A1