Latest Facebook 49 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/49.0.0.12.152;] Android 4 Galaxy Core Plus
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z777 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.2.152;] Android 4 Z777
Mozilla/5.0 (Linux; U; Android 4.3; en-us; MT2L03 Build/HuaweiMT2L03LITE) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Ascend Mate 2
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; vivo X3S Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 X3S
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; SM-C105S Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Galaxy S4 zoom
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; Micromax A47 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 A47
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-P875h Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Optimus F5
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; GT-I8550E Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Galaxy Win
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/49.0.0.12.152;] Android 4 Optimus G Pro
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; LG-P655K Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 P655K
Mozilla/5.0 (Linux; U; Android 4.0.4; pt-br; GT-S7562L Build/IMM76I) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Galaxy S DUOS
Mozilla/5.0 (Linux; U; Android 4.0.4; es-uy; LG-P778 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 P778
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/49.0.0.12.152;] Android 4 US730
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-AS730 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 AS730
Mozilla/5.0 (Linux; U; Android 4.0.3; en-au; HTC EVO 3D X515a Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 EVO 3D X515a
Mozilla/5.0 (Linux; Android 4.4.4; SM-G710L Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 Galaxy Grand 2
Mozilla/5.0 (Linux; Android 4.4.2; VIVO IV Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/49.0.0.12.152;] Android 4 IV
Mozilla/5.0 (iPad; CPU OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) Mobile/12F69 [FBAN/FBIOS;FBAV/49.0.0.72.166;FBBV/22916291;FBDV/iPad3,1;FBMD/iPad;FBSN/iPhone OS;FBSV/8.3;FBSS/2; FBCR/;FBID/tablet;FBLC/en_GB;FBOP/1] iOS 8 iPad 3