Latest Facebook 208 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; SM-G960F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 9 Galaxy S9
Mozilla/5.0 (Linux; Android 9; Pixel Build/PQ1A.190105.004; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 9 Pixel
Mozilla/5.0 (Linux; Android 9; Mi A2 Lite Build/PKQ1.180917.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 9 Mi A2 Lite
Mozilla/5.0 (Linux; Android 8.1.0; ASUS_X00TD Build/OPM1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 ZenFone Max Pro M1
Mozilla/5.0 (Linux; Android 8.1.0; Archos Access 57 3G Build/O21019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Access 57 3G
Mozilla/5.0 (Linux; Android 8.0.0; ZB555KL Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 ZenFone Max M1
Mozilla/5.0 (Linux; Android 8.0.0; WAS-LX1A Build/HUAWEIWAS-LX1A; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 P10 Lite
Mozilla/5.0 (Linux; Android 8.0.0; SM-J330FN Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy J3 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; SM-G930F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/73.0.3683.90 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy S7
Mozilla/5.0 (Linux; Android 8.0.0; SM-G930F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy S7
Mozilla/5.0 (Linux; Android 8.0.0; SM-A920F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy A9 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; SM-A720F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy A7 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; SAMSUNG-SM-G930A Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 8 Galaxy S7
Mozilla/5.0 (Linux; Android 7.1.2; LG-VK810 Build/NJH47F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 7 VK810
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510FN Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; HM-N700-FL Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 7 L7
Mozilla/5.0 (Linux; Android 7.0; WAS-LX1A Build/HUAWEIWAS-LX1A; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 7 P10 Lite
Mozilla/5.0 (Linux; Android 7.0; DLI-TL20 Build/HONORDLI-TL20; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 7 Honor 6A
Mozilla/5.0 (Linux; Android 6.0.1; SM-J106F Build/MMB29Q; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/208.0.0.38.104;] Android 6 Galaxy J1 mini Prime