Latest Facebook Messenger 151 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.2.2; pt-pt; TR10CS2 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Safari/534.30 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 4 TR10CS2
Mozilla/5.0 (Linux; Android 8.0.0; BLA-L09 Build/HUAWEIBLA-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 8 Mate 10 Pro
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; SM-N950F Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy Note 8
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510H Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510FN Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; E6853 Build/32.4.A.1.54; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Xperia Z5 Premium
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_X00HD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 ZenFone 4 Max
Mozilla/5.0 (Linux; Android 7.1.1; Aquaris X Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Aquaris X
Mozilla/5.0 (Linux; Android 7.0; WAS-LX1A Build/HUAWEIWAS-LX1A; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; WAS-LX1A Build/HUAWEIWAS-LX1A; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] 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/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 P10
Mozilla/5.0 (Linux; Android 7.0; VFD 610 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Smart N8
Mozilla/5.0 (Linux; Android 7.0; U22 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 U22
Mozilla/5.0 (Linux; Android 7.0; STF-L09 Build/HUAWEISTF-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Honor 9
Mozilla/5.0 (Linux; Android 7.0; SM-J710F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy J7
Mozilla/5.0 (Linux; Android 7.0; SM-G950F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy S8
Mozilla/5.0 (Linux; Android 7.0; SM-G935F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy S7 Edge
Mozilla/5.0 (Linux; Android 7.0; SM-G925F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy S6 Edge
Mozilla/5.0 (Linux; Android 7.0; SM-G925F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/151.0.0.17.95;] Android 7 Galaxy S6 Edge