Latest Facebook 46 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 9; de-at; SAMSUNG SM-G960UZBAUSC Build/PEN47J;) AppleWebKit/276.01 (KHTML, like Gecko) Version/43 Mobile Safari/276.01 [FB_IAB/FB4A;FBAV/46.1.3.56.26;] Android 9 Galaxy S9
Mozilla/5.0 (Linux; U; Android 8.0.0; de-at; SM-G960UZVATMK Build/RNA27O;) AppleWebKit/919.29 (KHTML, like Gecko) Version/41 Mobile Safari/919.29 [FB_IAB/FB4A;FBAV/46.2.2.87.53;] Android 8 Galaxy S9
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; vivo Y15T Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Y15T
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; GT-I9128I Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Galaxy Grand
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; GT-I8262B Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Galaxy Core
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/46.0.0.26.153;] Android 4 Z995
Mozilla/5.0 (Linux; U; Android 4.1.2; es-es; GT-S6810E Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Galaxy FAME
Mozilla/5.0 (Linux; U; Android 4.1.2; es-es; GT-I8550E Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Galaxy Win
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z995 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Z995
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/46.0.0.26.153;] Android 4 Z740G
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/46.0.0.26.153;] Android 4 Ascend G730
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; LG-P713 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Optimus L7 II
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/46.0.0.26.153;] Android 4 P655K
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; LG-E450f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Optimus L5 II
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/46.0.0.26.153;] Android 4 US730
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/46.0.0.26.153;] Android 4 LS860
Mozilla/5.0 (Linux; U; Android 4.0.4; en-ca; LG-P935 Build/IMM76D) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 P935
Mozilla/5.0 (Linux; U; Android 4.0.4; en-ca; GT-S7560M Build/IMM76I) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 Galaxy Trend
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/46.0.0.26.153;] Android 4 L40G
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; HTC PH39100 Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/46.0.0.26.153;] Android 4 PH39100