Latest Facebook 157 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; Pixel 2 XL Build/OPM1.171019.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 8 Pixel 2 XL
Mozilla/5.0 (Linux; Android 8.0.0; TA-1012 Build/OPR6.170623.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 8 8
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A5000 Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 8 5
Mozilla/5.0 (Linux; Android 8.0.0; F8331 Build/41.3.A.2.99; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 8 Xperia XZ
Mozilla/5.0 (Linux; Android 8.0.0; ASUS_Z017D Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 8 ZenFone 3
Mozilla/5.0 (Linux; Android 7.1.2; View XL Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.17.97;] Android 7 View XL
Mozilla/5.0 (Linux; Android 7.1.2; TA-1053 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 5
Mozilla/5.0 (Linux; Android 7.1.2; TA-1053 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.17.97;] Android 7 5
Mozilla/5.0 (Linux; Android 7.1.2; Redmi Note 5A Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Redmi Note 5A
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.2; ONE A2003 Build/NJH47F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 2
Mozilla/5.0 (Linux; Android 7.1.2; Mi-4c Build/NJH47F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Mi 4C
Mozilla/5.0 (Linux; Android 7.1.2; MI 5X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.4.97;] Android 7 Mi 5X
Mozilla/5.0 (Linux; Android 7.1.2; MI 5X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.0.7;] Android 7 Mi 5X
Mozilla/5.0 (Linux; Android 7.1.2; Aquaris X5 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Aquaris X5
Mozilla/5.0 (Linux; Android 7.1.1; ZTE Blade A522 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Blade A522
Mozilla/5.0 (Linux; Android 7.1.1; ZTE Blade A522 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Blade A522
Mozilla/5.0 (Linux; Android 7.1.1; ZTE Blade A522 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Blade A522
Mozilla/5.0 (Linux; Android 7.1.1; ZTE BLADE A0622 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 Blade A6
Mozilla/5.0 (Linux; Android 7.1.1; WIM Lite Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/157.0.0.38.97;] Android 7 WIM Lite