Latest Facebook Messenger 191 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; EML-L09 Build/HUAWEIEML-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 P20
Mozilla/5.0 (Linux; Android 8.1.0; DRA-LX3 Build/HUAWEIDRA-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y5 (2018)
Mozilla/5.0 (Linux; Android 8.1.0; CAG-L23 Build/HUAWEICAG-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y5 Lite (2018)
Mozilla/5.0 (Linux; Android 8.0.0; WAS-LX3 Build/HUAWEIWAS-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 P10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; SM-J600G Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Galaxy J6
Mozilla/5.0 (Linux; Android 8.0.0; SM-A600GN Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Galaxy A6
Mozilla/5.0 (Linux; Android 8.0.0; RNE-L23 Build/HUAWEIRNE-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Mate 10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; RNE-L03 Build/HUAWEIRNE-L03; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Mate 10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; LDN-LX3 Build/HUAWEILDN-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y7 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; LDN-LX3 Build/HUAWEILDN-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y7 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; FLA-LX3 Build/HUAWEIFLA-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y9 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; FIG-LX3 Build/HUAWEIFIG-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 P smart
Mozilla/5.0 (Linux; Android 8.0.0; BLA-L29 Build/HUAWEIBLA-L29S; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Mate 10 Pro
Mozilla/5.0 (Linux; Android 8.0.0; ATU-LX3 Build/HUAWEIATU-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 Y6 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; ANE-LX3 Build/HUAWEIANE-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 8 P20 Lite
Mozilla/5.0 (Linux; Android 7.1.1; SM-J250M Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 7 Galaxy J2 Pro
Mozilla/5.0 (Linux; Android 7.1.1; SM-J250M Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 7 Galaxy J2 Pro
Mozilla/5.0 (Linux; Android 7.0; WAS-LX3 Build/HUAWEIWAS-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 7 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; TRT-LX3 Build/HUAWEITRT-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 7 Y7 (2017)
Mozilla/5.0 (Linux; Android 7.0; TRT-L53 Build/HUAWEITRT-L53; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;] Android 7 Y7 Prime (2018)