Latest Facebook 270 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; ZTE Blade A7 2019 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.131 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Blade A7 (2019)
Mozilla/5.0 (Linux; Android 9; Z6201V Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Blade A7
Mozilla/5.0 (Linux; Android 9; X20 PRO Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 X20 Pro
Mozilla/5.0 (Linux; Android 9; VKY-TL00 Build/HUAWEIVKY-TL00; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 P10 Plus
Mozilla/5.0 (Linux; Android 9; vivo X21i Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 X21i
Mozilla/5.0 (Linux; Android 9; vivo 1916 Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 U10
Mozilla/5.0 (Linux; Android 9; V1934A Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Y5s
Mozilla/5.0 (Linux; Android 9; TA-1024 Build/PKQ1.181105.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 5
Mozilla/5.0 (Linux; Android 9; STK-LX1 Build/HONORSTK-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/84.0.4147.89 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 P smart Z
Mozilla/5.0 (Linux; Android 9; STK-L21 Build/HUAWEISTK-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Y9 Prime (2019)
Mozilla/5.0 (Linux; Android 9; SM-S102DL Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy A10e
Mozilla/5.0 (Linux; Android 9; SM-J737U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J737T Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J737A Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy J7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J701F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy J7 Core
Mozilla/5.0 (Linux; Android 9; SM-J600FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 Galaxy J6
Mozilla/5.0 (Linux; Android 9; SM-J530F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.117 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 Galaxy J5 (2017)
Mozilla/5.0 (Linux; Android 9; SM-J337U Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy J3 (2018)
Mozilla/5.0 (Linux; Android 9; SM-J337R4 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.0.0.57.127;] Android 9 Galaxy J3 Aura
Mozilla/5.0 (Linux; Android 9; SM-A705X Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/81.0.4044.138 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/270.1.0.66.127;] Android 9 Galaxy A70