Latest Facebook 38 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; G630-U251 Build/HuaweiG630-U251) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Ascend G630
Mozilla/5.0 (Linux; U; Android 4.3; en-us; SCH-R530X Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Galaxy S III LTE
Mozilla/5.0 (Linux; U; Android 4.2.2; en-nz; GT-S7275T Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Galaxy ACE 3
Mozilla/5.0 (Linux; U; Android 4.2.2; en-in; Micromax A114 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 A114
Mozilla/5.0 (Linux; U; Android 4.1.2; es-mx; LG-P659 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 P659
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z740G Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Z740G
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; SCH-R530X Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Galaxy S III LTE
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-E980h Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Optimus G Pro
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; ZTE-Z992 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 Avail 2
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; HTC T528w Build/JRO03H) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 T528w
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-P930 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 4 P930
Mozilla/5.0 (Linux; Android 6.0; Desire R7 Lite Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FBAN/InternetOrgApp;FBAV/38.0.0.2.11;] Android 6 Desire R7 Lite
Mozilla/5.0 (Linux; Android 5.1; 5070D Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 5 One Touch Pop Star
Mozilla/5.0 (Linux; Android 5.1.1; 9022X Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.106 Safari/537.36 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 5 One Touch Pixi 3 8"
Mozilla/5.0 (Linux; Android 5.1.1; 6044D Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/38.0.0.47.240;] Android 5 One Touch Pop Up
Mozilla/5.0 (Linux; Android 4.4.2; SM-G910S Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FBAN/InternetOrgApp;FBAV/38.0.0.2.11;] Android 4 Galaxy Round
Mozilla/5.0 (iPod touch; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/601.1.46 (KHTML, like Gecko) Mobile/13B143 [FBAN/FBIOS;FBAV/38.0.0.6.79;FBBV/14316658;FBDV/iPod5,1;FBMD/iPod touch;FBSN/iPhone OS;FBSV/9.1;FBSS/2; FBCR/;FBID/phone;FBLC/en_GB;FBOP/ iOS 9 iPod Touch 5
Mozilla/5.0 (iPhone; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12H321 [FBAN/FBIOS;FBAV/38.0.0.6.79;FBBV/14316658;FBDV/iPhone7,2;FBMD/iPhone;FBSN/iPhone OS;FBSV/8.4.1;FBSS/2; FBCR/TELUS;FBID/phone;FBLC/fr_FR;FBOP/5] iOS 8 iPhone 6
Mozilla/5.0 (iPhone; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12H321 [FBAN/FBIOS;FBAV/38.0.0.6.79;FBBV/14316658;FBDV/iPhone7,2;FBMD/iPhone;FBSN/iPhone OS;FBSV/8.4.1;FBSS/2; FBCR/3;FBID/phone;FBLC/en_US;FBOP/5] iOS 8 iPhone 6
Mozilla/5.0 (iPhone; CPU iPhone OS 8_4_1 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12H321 [FBAN/FBIOS;FBAV/38.0.0.6.79;FBBV/14316658;FBDV/iPhone7,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/8.4.1;FBSS/3; FBCR/CSL;FBID/phone;FBLC/en_US;FBOP/5] iOS 8 iPhone 6 Plus