Latest Facebook Messenger 187 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; DRA-LX3 Build/HUAWEIDRA-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/187.0.0.29.100;] Android 8 Y5 (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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 8 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; HUAWEI VNS-L23 Build/HUAWEIVNS-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/187.0.0.29.100;] Android 7 P9 Lite
Mozilla/5.0 (Linux; Android 7.0; HUAWEI CAN-L13 Build/HUAWEICAN-L13; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 7 Nova
Mozilla/5.0 (Linux; Android 7.0; FRD-L02 Build/HUAWEIFRD-L02; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 7 Honor 8
Mozilla/5.0 (Linux; Android 6.0; XT1064 Build/MPB24.65-34; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 6 Moto G2
Mozilla/5.0 (Linux; Android 6.0; MYA-L03 Build/HUAWEIMYA-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/187.0.0.29.100;] Android 6 Y5 (2017)
Mozilla/5.0 (Linux; Android 6.0; LG-H735 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 6 G4 Beat
Mozilla/5.0 (Linux; Android 6.0; DIG-L03 Build/HUAWEIDIG-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/187.0.0.29.100;] Android 6 P9 Lite Smart
Mozilla/5.0 (Linux; Android 6.0; CRO-L23 Build/HUAWEICRO-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/187.0.0.29.100;] Android 6 Y5 Lite (2017)
Mozilla/5.0 (Linux; Android 6.0; BLL-L23 Build/HUAWEIBLL-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/187.0.0.29.100;] Android 6 Mate 9 Lite
Mozilla/5.0 (Linux; Android 6.0.1; LG-M150 Build/MXB48T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 6 Phoenix 3
Mozilla/5.0 (Linux; Android 5.1; HUAWEI CUN-L23 Build/HUAWEICUN-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/187.0.0.29.100;] Android 5 Y5II
Mozilla/5.0 (Linux; Android 5.1.1; SM-J200M Build/LMY47X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 5 Galaxy J2
Mozilla/5.0 (Linux; Android 5.1.1; SM-J110M Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 5 Galaxy J1 Ace
Mozilla/5.0 (Linux; Android 5.1.1; LG-H735 Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 5 G4 Beat
Mozilla/5.0 (Linux; Android 5.0.2; LG-D722 Build/LRX22G; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 5 G3S
Mozilla/5.0 (Linux; Android 4.4.2; SM-G386T1 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 4 Galaxy Avant
Mozilla/5.0 (Linux; Android 4.4.2; LG-D325 Build/KOT49I.A1411471607) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 4 L70
Mozilla/5.0 (Linux; Android 4.4.2; G735-L03 Build/HuaweiG735-L03) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/187.0.0.29.100;] Android 4 G Play