Latest Facebook 131 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.2; Dslide714_v2 Build/NHG47K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 7 DSlide 714 v2
Mozilla/5.0 (Linux; Android 6.0; SUNNY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 6 Sunny
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 6.0; 5010D 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/131.0.0.32.69;] Android 6 One Touch Pixi 4 5" 3G
Mozilla/5.0 (Linux; Android 6.0.1; VFD 600 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 6 Smart Prime 7
Mozilla/5.0 (Linux; Android 6.0.1; SM-J700T1 Build/MMB29K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 6 Galaxy J7 (2016)
Mozilla/5.0 (Linux; Android 5.1; vivo 1707 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Y51 (2015)
Mozilla/5.0 (Linux; Android 5.1; NOS NOVU II Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Novu II
Mozilla/5.0 (Linux; Android 5.1; NOS NOVU II Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Novu II
Mozilla/5.0 (Linux; Android 5.1; HUAWEI CUN-L21 Build/HUAWEICUN-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Y5II
Mozilla/5.0 (Linux; Android 5.1; HUAWEI CUN-L01 Build/HUAWEICUN-L01; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Y5II
Mozilla/5.0 (Linux; Android 5.1; eSTAR GRAND HD Quad core 4G Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.106 Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Grand HD Quad Core 4G
Mozilla/5.0 (Linux; Android 5.1; B1-850 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Iconia One 8
Mozilla/5.0 (Linux; Android 5.1; APACHE G6 Build/LMY47I) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Apache G6
Mozilla/5.0 (Linux; Android 5.1.1; SM-J320FN Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Galaxy J3 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; SM-J320F Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Galaxy J3 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; SM-J120F Build/LMY47X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Galaxy J1 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; SM-G531H Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/131.0.0.32.69;] Android 5 Galaxy Grand Prime