Latest Facebook 151 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; Redmi Note 5 Pro Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 8 Redmi Note 5 Pro
Mozilla/5.0 (Linux; Android 8.1.0; Redmi Note 5 Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 8 Redmi Note 5
Mozilla/5.0 (Linux; Android 8.1.0; Redmi 5 Plus Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 8 Redmi 5 Plus
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A3010 Build/OPR6.170623.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 8 3T
Mozilla/5.0 (Linux; Android 7.1.2; Redmi Y1 Lite Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Redmi Y1 Lite
Mozilla/5.0 (Linux; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Redmi 4X
Mozilla/5.0 (Linux; Android 7.1.2; MI 5X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Mi 5X
Mozilla/5.0 (Linux; Android 7.1.2; Aquaris U2 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/151.0.0.44.205;] Android 7 Aquaris U2
Mozilla/5.0 (Linux; Android 7.1.1; Z Pro Build/NMF26O; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.100 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Z Pro
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; U FEEL PRIME Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 U Feel Prime
Mozilla/5.0 (Linux; Android 7.1.1; TOMMY2 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/151.0.0.44.205;] Android 7 Tommy 2
Mozilla/5.0 (Linux; Android 7.1.1; Moto E (4) Build/NMA26.42-11-3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Moto E4
Mozilla/5.0 (Linux; Android 7.1.1; Lenovo TB-X304F Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 TAB4 10
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_Z01MD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 ZenFone 4 Selfie Pro
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_Z01BD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 ZenFone 3 Laser
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_X00DD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 ZenFone 3 Max
Mozilla/5.0 (Linux; Android 7.1.1; Aquaris X5 Plus Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Aquaris X5 Plus
Mozilla/5.0 (Linux; Android 7.1.1; Aquaris X Pro Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/151.0.0.44.205;] Android 7 Aquaris X Pro