Latest Facebook 24 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; SM-G350M Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Galaxy Core Plus
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/24.0.0.38.15;] Android 4 Z667G
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/24.0.0.30.15;] Android 4 Z667G
Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-G710K Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Galaxy Grand 2
Mozilla/5.0 (Linux; U; Android 4.3; en-us; HUAWEI C8816D Build/HuaweiC8816D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 C8816D
Mozilla/5.0 (Linux; U; Android 4.2.2; pt-br; GT-S7580L Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Galaxy Trend Plus
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; vivo Y613 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Y613
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; SCH-R970U Build/JDQ39E) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 LiquidSmooth/Liquid-JB-v2.9/jflteusc [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Galaxy S4
Mozilla/5.0 (Linux; U; Android 4.2.1; en-in; Micromax A240 Build/JOP40D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Canvas Doodle 2
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-E467f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Optimus L4 II Dual
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-E410f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Optimus L1 II
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; ZTE-Z995 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Z995
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; ZTE-Z740 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Z740
Mozilla/5.0 (Linux; U; Android 4.1.2; es-ar; LG-E987 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Optimus G
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/24.0.0.30.15;] Android 4 Z998
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-LG730 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 730
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-E435g Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 Optimus L3 II
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/24.0.0.30.15;] Android 4 Ascend G730
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; HUAWEI C8815 Build/HuaweiC8815) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 C8815
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; HTC One VX Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/24.0.0.30.15;] Android 4 One VX