Latest Facebook 25 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/25.0.0.18.30;] 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/25.0.0.17.30;] Android 4 Z667G
Mozilla/5.0 (Linux; U; Android 4.3; en-us; HUAWEI H871G Build/HuaweiH871G) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.18.30;] Android 4 H871G
Mozilla/5.0 (Linux; U; Android 4.1.2; es-mx; LG-E450f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Optimus L5 II
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/25.0.0.18.30;] Android 4 Z998
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/25.0.0.18.30;] Android 4 Z740G
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; SCH-R740C Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Galaxy Discover
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-D520 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.12.30;] Android 4 D520
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; HUAWEI G730-C00 Build/HuaweiG730-C00) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Ascend G730
Mozilla/5.0 (Linux; U; Android 4.1.2; en-gb; GT-S5310G Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.17.30;] Android 4 Galaxy POCKET Neo
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; GT-I8730T Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Galaxy Express
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; ZTE-Z993 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Z993
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; ZTE-Z993 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.18.30;] Android 4 Z993
Mozilla/5.0 (Linux; U; Android 4.1.1; en-cn; HTC T329t Build/JRO03H) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 T329t
Mozilla/5.0 (Linux; U; Android 4.0.4; pt-pt; bq Aquaris Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 Aquaris
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-US730 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 US730
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-SU760 Build/ICS) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.0.19;] Android 4 SU760
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-P925 Build/ICS) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 P925
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-LS860 Build/IMM76I) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.19.30;] Android 4 LS860
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-LS840 Build/ZVK.IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/25.0.0.17.30;] Android 4 Viper 4G LTE