Latest Facebook Messenger 253 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; SM-G950F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] 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/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 9 Galaxy A7 (2018)
Mozilla/5.0 (Linux; Android 9; Mi 9T Build/PKQ1.190302.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 9 Mi 9T
Mozilla/5.0 (Linux; Android 9; CPH1937 Build/PKQ1.190714.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 9 A9 (2020)
Mozilla/5.0 (Linux; Android 9; BLA-L29 Build/HUAWEIBLA-L29S; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 9 Mate 10 Pro
Mozilla/5.0 (Linux; Android 9; ANE-LX1 Build/HUAWEIANE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 9 P20 Lite
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/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 8 Redmi 5
Mozilla/5.0 (Linux; Android 8.1.0; MI 6 Build/OPM7.181205.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 8 Mi 6
Mozilla/5.0 (Linux; Android 8.1.0; CPH1903 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 8 AX7
Mozilla/5.0 (Linux; Android 8.0.0; WAS-LX1 Build/HUAWEIWAS-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 8 P10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; SM-G930F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 8 Galaxy S7
Mozilla/5.0 (Linux; Android 7.1.1; SM-J250F Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/75.0.3770.101 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 7 Galaxy J2 Pro
Mozilla/5.0 (Linux; Android 7.1.1; CPH1729 Build/N6F26Q; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 7 A83
Mozilla/5.0 (Linux; Android 6.0; Infinix HOT4 LTE Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 6 HOT4 LTE
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 10; SM-G973F Build/QP1A.190711.020; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 10 Galaxy S10
Mozilla/5.0 (Linux; Android 10; JSN-L21 Build/HONORJSN-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.119 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/253.0.0.17.117;] Android 10 Honor 8X