Latest Facebook 508 user agents:

User Agent Platform Device
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/22D8075 [FBAN/FBIOS;FBAV/508.0.0.61.95;FBBV/719436284;FBDV/iPhone17,5;FBMD/iPhone;FBSN/iOS;FBSV/18.3.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/0;IABMV/1] iOS 18 iPhone 16e
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21E236 [FBAN/FBIOS;FBAV/508.1.0.72.95;FBBV/720370353;FBDV/iPhone12,5;FBMD/iPhone;FBSN/iOS;FBSV/17.4.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/723454763;IABMV/1] iOS 17 iPhone 11 Pro Max
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/21F90 [FBAN/FBIOS;FBAV/508.1.0.72.95;FBBV/720370353;FBDV/iPhone12,3;FBMD/iPhone;FBSN/iOS;FBSV/17.5.1;FBSS/3;FBID/phone;FBLC/en_US;FBOP/5;FBRV/723454763;IABMV/1] iOS 17 iPhone 11 Pro
Mozilla/5.0 (Linux; Android 9; ZT216_1 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 ZT216
Mozilla/5.0 (Linux; Android 9; Y4800 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Y4800
Mozilla/5.0 (Linux; Android 9; X20 PRO Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 X20 Pro
Mozilla/5.0 (Linux; Android 9; Wildfire E Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/136.0.7103.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.62.109;] Android 9 Wildfire E
Mozilla/5.0 (Linux; Android 9; vivo X21A Build/PKQ1.180819.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 X21A
Mozilla/5.0 (Linux; Android 9; V1941A Build/PKQ1.190302.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 U3
Mozilla/5.0 (Linux; Android 9; U70B Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] FBNV/5 Android 9 U70B
Mozilla/5.0 (Linux; Android 9; U70B Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 U70B
Mozilla/5.0 (Linux; Android 9; TX6 Build/PPR1.181005.003; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 TX6
Mozilla/5.0 (Linux; Android 9; Trekker-X4 Build/PKQ1.190414.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Trekker-X4
Mozilla/5.0 (Linux; Android 9; TECNO CC9 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;] Android 9 Camon 12 Pro
Mozilla/5.0 (Linux; Android 9; T9S Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 T9 S
Mozilla/5.0 (Linux; Android 9; SM-T867V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Galaxy Tab S6 10.5" LTE
Mozilla/5.0 (Linux; Android 9; SM-T827V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Galaxy Tab S3 9.7" LTE
Mozilla/5.0 (Linux; Android 9; SM-T827R4 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Galaxy Tab S3 9.7" LTE
Mozilla/5.0 (Linux; Android 9; SM-T825 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] Android 9 Galaxy Tab S3 9.7" LTE
Mozilla/5.0 (Linux; Android 9; SM-T820 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/135.0.7049.76 Safari/537.36 [FB_IAB/FB4A;FBAV/508.0.0.74.47;IABMV/1;] FBNV/500 Android 9 Galaxy Tab S3 9.7" WiFi