Latest Facebook 164 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.1.0; Pixel C Build/OPM1.171019.022.A1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.18.95;] Android 8 Pixel C
Mozilla/5.0 (Linux; Android 8.1.0; Nexus 6P Build/OPM3.171019.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Nexus 6P
Mozilla/5.0 (Linux; Android 8.1.0; Nexus 5X Build/OPM3.171019.016; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Nexus 5X
Mozilla/5.0 (Linux; Android 8.0.0; VTR-L29 Build/HUAWEIVTR-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 P10
Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Galaxy S8
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A5010 Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 5T
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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 3T
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A3003 Build/OPR6.170623.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 3
Mozilla/5.0 (Linux; Android 8.0.0; Mi A1 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/164.0.0.44.95;] Android 8 Mi A1
Mozilla/5.0 (Linux; Android 8.0.0; MI 6 Build/OPR1.170623.027; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Mi 6
Mozilla/5.0 (Linux; Android 8.0.0; MI 6 Build/OPR1.170623.027; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.37.95;] Android 8 Mi 6
Mozilla/5.0 (Linux; Android 8.0.0; G8232 Build/41.3.A.2.75; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Xperia XZs
Mozilla/5.0 (Linux; Android 8.0.0; G8141 Build/47.1.A.12.119; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Xperia XZ Premium
Mozilla/5.0 (Linux; Android 8.0.0; G3112 Build/48.1.A.0.116; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Xperia XA1
Mozilla/5.0 (Linux; Android 8.0.0; F8332 Build/41.3.A.2.99; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.37.95;] Android 8 Xperia XZ
Mozilla/5.0 (Linux; Android 8.0.0; F5122 Build/34.4.A.2.32; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Xperia X Dual
Mozilla/5.0 (Linux; Android 8.0.0; BLA-L29 Build/HUAWEIBLA-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 8 Mate 10 Pro
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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] 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/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] 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/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/164.0.0.44.95;] Android 7 Redmi 4X