Latest Facebook 206 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; SM-J737T Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-G950U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 9 Galaxy S8
Mozilla/5.0 (Linux; Android 9; COL-L29 Build/HUAWEICOL-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 9 Honor 10
Mozilla/5.0 (Linux; Android 9; COL-L29 Build/HUAWEICOL-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 9 Honor 10
Mozilla/5.0 (Linux; Android 8.1.0; Infinix X606D Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Hot 6
Mozilla/5.0 (Linux; Android 8.0.0; ZE552KL Build/OPR1.170623.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.35.105;] Android 8 ZenFone 3
Mozilla/5.0 (Linux; Android 8.0.0; SM-G960F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Galaxy S9
Mozilla/5.0 (Linux; Android 8.0.0; SM-G935F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Galaxy S7 Edge
Mozilla/5.0 (Linux; Android 8.0.0; SM-A720F Build/R16NW; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Galaxy A7 (2017)
Mozilla/5.0 (Linux; Android 8.0.0; G3112 Build/48.1.A.0.138; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.105 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Xperia XA1
Mozilla/5.0 (Linux; Android 8.0.0; FLA-LX1 Build/HUAWEIFLA-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Y9 (2018)
Mozilla/5.0 (Linux; Android 8.0.0; FLA-LX1 Build/HUAWEIFLA-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 8 Y9 (2018)
Mozilla/5.0 (Linux; Android 7.0; Redmi Note 4 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 7 Redmi Note 4
Mozilla/5.0 (Linux; Android 6.0; vivo 1601 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.132 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.35.105;] Android 6 V5
Mozilla/5.0 (Linux; Android 6.0; MYA-U29 Build/HUAWEIMYA-U29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.35.105;] Android 6 Y5 (2017)
Mozilla/5.0 (Linux; Android 6.0; FRD-L04 Build/HUAWEIVAT-L04; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/71.0.3578.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/206.0.0.36.105;] Android 6 Honor 8
Mozilla/5.0 (iPhone; CPU iPhone OS 12_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/16C101 [FBAN/FBIOS;FBAV/206.0.0.35.103;FBBV/140132201;FBDV/iPhone8,2;FBMD/iPhone;FBSN/iOS;FBSV/12.1.2;FBSS/3;FBCR/OPTUS;FBID/phone;FBLC/en_GB;FBO iOS 12 iPhone 6s Plus
Mozilla/5.0 (iPad; CPU OS 14_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/FBIOS;FBAV/206.0.0.35.103;FBBV/140132201;FBDV/iPad5,3;FBMD/iPad;FBSN/iOS;FBSV/14.1;FBSS/2;FBCR/;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/0] iPadOS 14 iPad Air 2
Mozilla/5.0 (iPad; CPU OS 12_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 [FBAN/FBIOS;FBAV/206.0.0.35.103;FBBV/140132201;FBDV/iPad4,8;FBMD/iPad;FBSN/iOS;FBSV/12.3.1;FBSS/2;FBCR/Verizon;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/0 iOS 12 iPad Mini 3
Mozilla/5.0 (iPad; CPU OS 12_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/16C50 [FBAN/FBIOS;FBAV/206.0.0.35.103;FBBV/140132201;FBDV/iPad5,1;FBMD/iPad;FBSN/iOS;FBSV/12.1.1;FBSS/2;FBCR/;FBID/tablet;FBLC/en_US;FBOP/5;FBRV/0] iOS 12 iPad Mini 4