Latest Facebook 175 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; W_K300 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Jerry 3
Mozilla/5.0 (Linux; Android 8.1.0; VFD 720 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Smart N9
Mozilla/5.0 (Linux; Android 8.1.0; VFD 620 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Smart N9 Lite
Mozilla/5.0 (Linux; Android 8.1.0; TA-1024 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 5
Mozilla/5.0 (Linux; Android 8.1.0; SM-J500F Build/OPM2.171019.029.B1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.139 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Galaxy J5 (2015)
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A6003 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 6
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A6003 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 6
Mozilla/5.0 (Linux; Android 8.1.0; Nokia 1 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 1
Mozilla/5.0 (Linux; Android 8.1.0; Aquaris X Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Aquaris X
Mozilla/5.0 (Linux; Android 8.1.0; Aquaris X Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Aquaris X
Mozilla/5.0 (Linux; Android 8.0.0; XT1635-02 Build/OPN27.76-12-22; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.68 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Moto Z Play
Mozilla/5.0 (Linux; Android 8.0.0; TA-1024 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 5
Mozilla/5.0 (Linux; Android 8.0.0; STF-L09 Build/HUAWEISTF-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.68 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Honor 9
Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.2.97;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; SM-A520F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Galaxy A5 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; SM-A320FL Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.68 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Galaxy A3 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A3003 Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.81 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 3
Mozilla/5.0 (Linux; Android 8.0.0; Mi A1 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Mi A1
Mozilla/5.0 (Linux; Android 8.0.0; Mi A1 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/175.0.0.40.97;] Android 8 Mi A1