Latest Facebook 44 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-mx; LG-E425 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.0.31;] Android 4 E425
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; HTC X920e Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 X920e
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/44.0.0.26.142;] Android 4 A114
Mozilla/5.0 (Linux; U; Android 4.1.2; ja-jp; GL07S Build/HuaweiU9700L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 U9700L
Mozilla/5.0 (Linux; U; Android 4.1.2; es-ve; CM990 Build/HuaweiCM990) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 Evolucion 3
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; LG-P870 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 P870
Mozilla/5.0 (Linux; U; Android 4.1.2; es-mx; LG-P870 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 P870
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z740 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 Z740
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-F100L Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 Optimus Vu
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-AS780 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.25.142;] Android 4 AS780
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/44.0.0.26.142;] Android 4 US730
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-F100S Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 Optimus Vu
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/44.0.0.26.142;] Android 4 AS730
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; LG-L40G Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 L40G
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; LG-L40G Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.25.142;] Android 4 L40G
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; HTC_Amaze_4G Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 Amaze 4G
Mozilla/5.0 (Linux; Android 5.1.1; Nexus 4 Build/LMY48I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/45.0.2454.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 5 Nexus 4
Mozilla/5.0 (Linux; Android 5.1.1; Nexus 4 Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.117 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 5 Nexus 4
Mozilla/5.0 (Linux; Android 5.0.1; LG-AS990 Build/LRX21Y; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/45.0.2454.95 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 5 G3
Mozilla/5.0 (Linux; Android 4.4.4; LG-D390 Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/44.0.0.26.142;] Android 4 D390