Latest Facebook Messenger 164 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; vivo 1723 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 V9
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A5010 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 5T
Mozilla/5.0 (Linux; Android 8.0.0; VKY-L29 Build/HUAWEIVKY-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 P10 Plus
Mozilla/5.0 (Linux; Android 8.0.0; VKY-L09 Build/HUAWEIVKY-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 P10 Plus
Mozilla/5.0 (Linux; Android 8.0.0; SM-N950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 Galaxy Note 8
Mozilla/5.0 (Linux; Android 8.0.0; SM-G960F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 Galaxy S9
Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; SM-A520F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 Galaxy A5 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; BLA-L29 Build/HUAWEIBLA-L29S; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 Mate 10 Pro
Mozilla/5.0 (Linux; Android 8.0.0; ANE-LX1 Build/HUAWEIANE-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 8 P20 Lite
Mozilla/5.0 (Linux; Android 7.1.2; vivo 1718 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 V7
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 5 Plus Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 Redmi 5 Plus
Mozilla/5.0 (Linux; Android 7.1.1; TA-1053 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 5
Mozilla/5.0 (Linux; Android 7.1.1; SM-J700T1 Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 Galaxy J7 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510FN Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; Moto G (5S) Plus Build/NPSS26.116-26-11; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.18.95;] Android 7 Moto G5s Plus
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_Z01MD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 ZenFone 4 Selfie Pro
Mozilla/5.0 (Linux; Android 7.0; WAS-LX1A Build/HUAWEIWAS-LX1A; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; VTR-L09 Build/HUAWEIVTR-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 P10
Mozilla/5.0 (Linux; Android 7.0; SM-J730GM Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/164.0.0.24.95;] Android 7 Galaxy J7 Pro