Latest Facebook Messenger 189 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; vivo 1727 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 V9 Youth
Mozilla/5.0 (Linux; Android 8.1.0; SM-J701M Build/M1AJQ; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 Galaxy J7 Core
Mozilla/5.0 (Linux; Android 8.1.0; CAG-L23 Build/HUAWEICAG-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 Y5 Lite (2018)
Mozilla/5.0 (Linux; Android 8.0.0; RNE-L23 Build/HUAWEIRNE-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/189.0.0.27.99;] 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/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 Y9 (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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 Y9 (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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/189.0.0.27.99;] Android 8 P smart
Mozilla/5.0 (Linux; Android 8.0.0; FIG-LX3 Build/HUAWEIFIG-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 P smart
Mozilla/5.0 (Linux; Android 8.0.0; FIG-LX3 Build/HUAWEIFIG-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 P smart
Mozilla/5.0 (Linux; Android 8.0.0; FIG-LX3 Build/HUAWEIFIG-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 P smart
Mozilla/5.0 (Linux; Android 8.0.0; ATU-LX3 Build/HUAWEIATU-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 8 P20 Lite
Mozilla/5.0 (Linux; Android 8.0.0; ANE-LX3 Build/HUAWEIANE-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 7 Galaxy J2 Pro
Mozilla/5.0 (Linux; Android 7.0; TRT-LX3 Build/HUAWEITRT-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.64 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/189.0.0.27.99;] Android 7 Y7 (2017)