Latest Facebook Messenger 244 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; SM-J530F 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/244.0.0.16.236;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-A505FM Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.79 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 9 Galaxy A50
Mozilla/5.0 (Linux; Android 9; Redmi 6 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/244.0.0.16.236;] Android 9 Redmi 6
Mozilla/5.0 (Linux; Android 9; EML-L29 Build/HUAWEIEML-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 9 P20
Mozilla/5.0 (Linux; Android 9; EML-L29 Build/HUAWEIEML-L2901; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 9 P20
Mozilla/5.0 (Linux; Android 9; COL-L29 Build/HUAWEICOL-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.93 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 9 Honor 10
Mozilla/5.0 (Linux; Android 7.1.2; KFMUWI Build/NS6315; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Fire OS 6 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 7.0; F3212 Build/36.1.A.1.112; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 7 Xperia XA Ultra Dual
Mozilla/5.0 (Linux; Android 5.1; vivo 1707 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 5 Y51 (2015)
Mozilla/5.0 (Linux; Android 5.1.1; KIW-L21 Build/HONORKIW-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.79 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 5 Honor 5X
Mozilla/5.0 (Linux; Android 4.4.2; MyPhone MY22 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 4 MY22
Mozilla/5.0 (Linux; Android 10; Nokia 7 plus Build/QKQ1.190828.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.99 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/244.0.0.16.236;] Android 10 7 plus