Latest Facebook 170 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; TA-1004 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 8
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A5010 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 5T
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A5000 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 5
Mozilla/5.0 (Linux; Android 8.1.0; Nokia 1 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 1
Mozilla/5.0 (Linux; Android 8.1.0; Nexus 5X Build/OPM2.171019.029; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.139 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Nexus 5X
Mozilla/5.0 (Linux; Android 8.1.0; Nexus 5X Build/OPM2.171019.029; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Nexus 5X
Mozilla/5.0 (Linux; Android 8.1.0; BKL-L04 Build/HUAWEIBKL-L04; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Honor View 10
Mozilla/5.0 (Linux; Android 8.1.0; Aquaris X Pro 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/170.0.0.52.95;] Android 8 Aquaris X Pro
Mozilla/5.0 (Linux; Android 8.1.0; Aquaris X Pro Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Aquaris X Pro
Mozilla/5.0 (Linux; Android 8.1.0; Active 1 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Active 1
Mozilla/5.0 (Linux; Android 8.0.0; XT1650 Build/OPL27.76-51; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Moto Z
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/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Moto Z Play
Mozilla/5.0 (Linux; Android 8.0.0; VTR-L29 Build/HUAWEIVTR-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 P10
Mozilla/5.0 (Linux; Android 8.0.0; U_Pro Build/Elephone_U_Pro_20180227; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 U Pro
Mozilla/5.0 (Linux; Android 8.0.0; U_Pro Build/Elephone_U_Pro_20180207; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 U Pro
Mozilla/5.0 (Linux; Android 8.0.0; SM-N950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Galaxy Note 8
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/170.0.0.52.95;] 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/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; SM-A320F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Galaxy A3 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; Pixel XL Build/OPR3.170623.007; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/170.0.0.52.95;] Android 8 Pixel XL