Latest Facebook 191 user agents:

User Agent Platform Device
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/FB4A;FBAV/191.0.0.35.96;] Android 8 Galaxy J7 Core
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/FB4A;FBAV/191.0.0.35.96;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Y5 Lite (2018)
Mozilla/5.0 (Linux; Android 8.1.0; CAG-L03 Build/HUAWEICAG-L03; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 P10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; VTR-L09 Build/HUAWEIVTR-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 P10
Mozilla/5.0 (Linux; Android 8.0.0; SM-J600G Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Galaxy J6
Mozilla/5.0 (Linux; Android 8.0.0; SM-J400M Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Galaxy J4
Mozilla/5.0 (Linux; Android 8.0.0; SM-A520F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Galaxy A5 (2017)
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/FB4A;FBAV/191.0.0.35.96;] 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/FB4A;FBAV/191.0.0.35.96;] Android 8 Mate 10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; PRA-LX3 Build/HUAWEIPRA-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Nova Lite
Mozilla/5.0 (Linux; Android 8.0.0; PRA-LX3 Build/HUAWEIPRA-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 Nova Lite
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A3000 Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] Android 8 3
Mozilla/5.0 (Linux; Android 8.0.0; LDN-LX3 Build/HUAWEILDN-LX3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/69.0.3497.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] 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/FB4A;FBAV/191.0.0.35.96;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] 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/FB4A;FBAV/191.0.0.35.96;] 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/69.0.3497.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/191.0.0.35.96;] 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/FB4A;FBAV/191.0.0.35.96;] Android 8 Y6 (2018)