Latest Facebook 71 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z669 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Z669
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z667G Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Z667G
Mozilla/5.0 (Linux; U; Android 4.2.2; en-au; GT-S7275Y Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Galaxy ACE 3
Mozilla/5.0 (Linux; U; Android 4.2.1; en-in; Micromax A210 Build/JOP40D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 A210
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; LG-LG870 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 870
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z998 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Z998
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; SCH-I200 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.5.73;] Android 4 Galaxy Stellar
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; HTC_0P6A1 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 0P6A1
Mozilla/5.0 (Linux; U; Android 4.0.4; es-mx; LG-P930 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 P930
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-MS870 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Sprint 4G
Mozilla/5.0 (Linux; U; Android 4.0.3; en-ca; HTC-Z710a Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 4 Z710a
Mozilla/5.0 (Linux; Android 5.1.1; QTAQZ3 Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Safari/537.36 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 5 Ellipsis 8
Mozilla/5.0 (Linux; Android 5.0.2; HTC_0P3P5 Build/LRX22G; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/49.0.2623.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/71.0.0.17.73;] Android 5 0P3P5
Dalvik/2.1.0 (Linux; U; Android 12; Quest 2 Build/SQ3A.220605.009.A1) [FBAN/OculusGuardian;FBAV/71.0.0.614.530;FBDV/Quest 2;FBCR/null;FBLC/en_US;FBSV/12;FBVI/51203760115400150;FBBD/oculus;FBBV/665362739;FBCA/arm64-v8a:;FBMF/Oculus;FBPN/com.oculus.guardian;] Android 12 Unknown
Dalvik/2.1.0 (Linux; U; Android 12; Quest 2 Build/SQ3A.220605.009.A1) [FBAN/OculusGuardian;FBAV/71.0.0.614.530;FBDV/Quest 2;FBCR/null;FBLC/en_GB;FBSV/12;FBVI/51203760115400150;FBBD/oculus;FBBV/665362739;FBCA/arm64-v8a:;FBMF/Oculus;FBPN/com.oculus.guardian;] Android 12 Unknown