Latest Facebook 32 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; it-it; Galaxy Nexus Build/JWR66Y) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Nexus
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/32.0.0.23.15;] Android 4 Galaxy Core Plus
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z669 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Z669
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; SM-G3858 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Beam 2
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; SM-G3502 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Core Plus
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; GT-I9082 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Grand Duos
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/32.0.0.23.15;] Android 4 A114
Mozilla/5.0 (Linux; U; Android 4.2.2; en-au; GT-S7580L Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Trend Plus
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-E470f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Optimus L4 II
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-E465f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Optimus L4 II
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-br; LG-E455f Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 E455f
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/32.0.0.23.15;] Android 4 Z995
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; ZTE-Z740G Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Z740G
Mozilla/5.0 (Linux; U; Android 4.1.2; es-us; GT-B5330L Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Chat
Mozilla/5.0 (Linux; U; Android 4.1.2; es-mx; LG-E440g Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Optimus L4 II
Mozilla/5.0 (Linux; U; Android 4.1.2; es-ar; LG-P712 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Optimus L7 II
Mozilla/5.0 (Linux; U; Android 4.1.2; es-ar; LG-E431g Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 E431g
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-E450g Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Optimus L5 II
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; GT-S6812i Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy FAME Duos
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; GT-S6310T Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/32.0.0.23.15;] Android 4 Galaxy Young