Latest Facebook 61 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; SM-N7505L Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Galaxy Note 3 Neo
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/61.0.0.15.69;] Android 4 Ascend Mate 2
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; Micromax A76 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 A76
Mozilla/5.0 (Linux; U; Android 4.2.2; en-gb; SM-C105S Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Galaxy S4 zoom
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/61.0.0.15.69;] Android 4 Canvas Doodle 2
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/61.0.0.15.69;] Android 4 A210
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-F240 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 F240
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-F160LV Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Optimus LTE 2
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/61.0.0.15.69;] Android 4 Galaxy Express
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; ZTE-Z992 Build/JRO03C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Avail 2
Mozilla/5.0 (Linux; U; Android 4.1.1; en-us; Prism II Build/HuaweiU8686) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 U8686
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; SGH-S730G Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Galaxy Discover
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/61.0.0.15.69;] Android 4 AS730
Mozilla/5.0 (Linux; U; Android 4.0.4; en-ie; GT-S7560 Build/IMM76I) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 Galaxy Trend
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; HUAWEI U8681 Build/HuaweiU8681) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 4 U8681
Mozilla/5.0 (Linux; Android 5.1; HUAWEI CUN-L23 Build/HUAWEICUN-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 5 Y5II
Mozilla/5.0 (Linux; Android 5.1; HUAWEI CUN-L23 Build/HUAWEICUN-L23; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 5 Y5II
Mozilla/5.0 (Linux; Android 5.1.1; Y538 Build/HuaweiY538) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 5 Y538
Mozilla/5.0 (Linux; Android 5.1.1; SM-G531F Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 5 Galaxy Grand Prime
Mozilla/5.0 (Linux; Android 5.1.1; 9020A Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/42.0.2311.137 Safari/537.36 [FB_IAB/FB4A;FBAV/61.0.0.15.69;] Android 5 One Touch Trek HD