Latest Facebook 122 user agents:

User Agent Platform Device
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/122.0.0.17.71;] Android 4 Z669
Mozilla/5.0 (Linux; U; Android 4.2.2; pt-br; GT-I9082L Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 Galaxy Grand Duos
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/122.0.0.17.71;] Android 4 Z995
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; SCH-R740C Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 Galaxy Discover
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; LG-E971 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 E971
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; HTC_0P6A1 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 0P6A1
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/122.0.0.17.71;] Android 4 Avail 2
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-MS870 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 Sprint 4G
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; HUAWEI U9510E Build/HuaweiU9510E) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 4 U9510E
Mozilla/5.0 (Linux; Android 7.0; VFD 610 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 7 Smart N8
Mozilla/5.0 (Linux; Android 7.0; PRA-LX1 Build/HUAWEIPRA-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 7 P8 Lite (2017)
Mozilla/5.0 (Linux; Android 7.0; NOA N2 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/51.0.2704.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 7 N2
Mozilla/5.0 (Linux; Android 6.0; XT1078 Build/MPBS24.65-34-5; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 XT1078
Mozilla/5.0 (Linux; Android 6.0; STARTRAIL 8 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 StarTrail 8
Mozilla/5.0 (Linux; Android 6.0; LG-K430 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 K10
Mozilla/5.0 (Linux; Android 6.0; LG-H900PR Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 V10
Mozilla/5.0 (Linux; Android 6.0; BLU STUDIO SELFIE 2 Build/S230Q; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 Studio Selfie 2
Mozilla/5.0 (Linux; Android 6.0; 4034X Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 One Touch Pixi 4 4"
Mozilla/5.0 (Linux; Android 6.0; 4034X Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 One Touch Pixi 4 4"
Mozilla/5.0 (Linux; Android 6.0; 4034D Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/122.0.0.17.71;] Android 6 One Touch Pixi 4 4"