Latest Facebook 161 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; Pixel 2 XL Build/OPM1.171019.018; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 8 Pixel 2 XL
Mozilla/5.0 (Linux; Android 8.0.0; TA-1024 Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 8 5
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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 8 ZenFone 3
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/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 8 ZenFone 3
Mozilla/5.0 (Linux; Android 7.1.2; Redmi Note 5A Prime 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/161.0.0.35.93;] Android 7 Redmi Note 5A Prime
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/161.0.0.35.93;] Android 7 Redmi 4X
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/161.0.0.35.93;] 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/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 7 Mi 5X
Mozilla/5.0 (Linux; Android 7.1.2; Livecore7032 Build/NHG47K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 7 Livecore 7032
Mozilla/5.0 (Linux; Android 7.1.2; Livecore7032 Build/NHG47K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 7 Livecore 7032
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/161.0.0.35.93;] Android 7 Blade A522
Mozilla/5.0 (Linux; Android 7.1.1; WIM Lite Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 7 WIM Lite
Mozilla/5.0 (Linux; Android 7.1.1; VFD 710 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/161.0.0.35.93;] Android 7 Smart V8
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] 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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] 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/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/161.0.0.35.93;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; TOMMY2 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/161.0.0.35.93;] Android 7 Tommy 2
Mozilla/5.0 (Linux; Android 7.1.1; TOMMY2 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/161.0.0.35.93;] Android 7 Tommy 2
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/161.0.0.35.93;] Android 7 Tommy 2
Mozilla/5.0 (Linux; Android 7.1.1; TA-1053 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/161.0.0.35.93;] Android 7 5