Latest Facebook Messenger 163 user agents:

User Agent Platform Device
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/163.0.0.26.94;] Android 8 5T
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A5000 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/163.0.0.26.94;] Android 8 5
Mozilla/5.0 (Linux; Android 8.0.0; 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/163.0.0.26.94;] Android 8 P10
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/163.0.0.26.94;] Android 8 Galaxy Note 8
Mozilla/5.0 (Linux; Android 8.0.0; MHA-L29 Build/HUAWEIMHA-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/163.0.0.26.94;] Android 8 Mate 9
Mozilla/5.0 (Linux; Android 7.1.2; Redmi Note 5A 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/163.0.0.26.94;] Android 7 Redmi Note 5A
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/163.0.0.26.94;] Android 7 Redmi 5 Plus
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 5 Plus Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.106 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/163.0.0.12.94;] Android 7 Redmi 5 Plus
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X 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/163.0.0.26.94;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/163.0.0.26.94;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4A Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/163.0.0.26.94;] Android 7 Redmi 4A
Mozilla/5.0 (Linux; Android 7.1.1; Z983 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/163.0.0.26.94;] Android 7 Blade X Max
Mozilla/5.0 (Linux; Android 7.1.1; SM-A530F 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/163.0.0.26.94;] Android 7 Galaxy A8
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_X00DD 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/163.0.0.26.94;] Android 7 ZenFone 3 Max
Mozilla/5.0 (Linux; Android 7.0; WAS-LX1 Build/HUAWEIWAS-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/163.0.0.26.94;] Android 7 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; VKY-L09 Build/HUAWEIVKY-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/163.0.0.26.94;] Android 7 P10 Plus
Mozilla/5.0 (Linux; Android 7.0; VFD 610 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/163.0.0.26.94;] Android 7 Smart N8
Mozilla/5.0 (Linux; Android 7.0; SM-N920C 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/163.0.0.26.94;] Android 7 Galaxy Note 5
Mozilla/5.0 (Linux; Android 7.0; SM-J730G 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/163.0.0.26.94;] Android 7 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 7.0; SM-J730F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/163.0.0.8.94;] Android 7 Galaxy J7 Pro