Latest Facebook 273 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; ZTE Blade A5 2020 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Blade A5 (2020)
Mozilla/5.0 (Linux; Android 9; ZTE Blade A5 2019 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Blade A5 (2019)
Mozilla/5.0 (Linux; Android 9; ZTE 2050RU Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.141 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Blade 20 Smart
Mozilla/5.0 (Linux; Android 9; YAL-L41 Build/HUAWEIYAL-L91; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Honor 20 Pro
Mozilla/5.0 (Linux; Android 9; YAL-L21 Build/HUAWEIYAL-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.164 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Honor 20
Mozilla/5.0 (Linux; Android 9; W-V720-EEA Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Y80
Mozilla/5.0 (Linux; Android 9; VTR-L09 Build/HUAWEIVTR-L09; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 P10
Mozilla/5.0 (Linux; Android 9; vivo 1916 Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.181 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] 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/114.0.5735.131 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Y5s
Mozilla/5.0 (Linux; Android 9; V1928A Build/PKQ1.190626.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 U3X
Mozilla/5.0 (Linux; Android 9; U304AA Build/P00610; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Radiant Core
Mozilla/5.0 (Linux; Android 9; TA-1021 Build/PKQ1.181105.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/88.0.4324.181 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 6
Mozilla/5.0 (Linux; Android 9; SM-J730F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.101 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy J7 Pro
Mozilla/5.0 (Linux; Android 9; SM-J600FN 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/273.0.0.39.123;] Android 9 Galaxy J6
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/273.0.0.39.123;] Android 9 Galaxy J3 Aura
Mozilla/5.0 (Linux; Android 9; SM-J330FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.120 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy J3 (2017)
Mozilla/5.0 (Linux; Android 9; SM-A750FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.99 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy A7 (2018)
Mozilla/5.0 (Linux; Android 9; SM-A705X Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.96 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy A70
Mozilla/5.0 (Linux; Android 9; SM-A405FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/80.0.3987.162 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy A40
Mozilla/5.0 (Linux; Android 9; SM-A405FN Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.108 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/273.0.0.39.123;] Android 9 Galaxy A40