Latest Facebook Messenger 228 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; JKM-LX1 Build/HUAWEIJKM-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 9 Y9 (2019)
Mozilla/5.0 (Linux; Android 8.1.0; KS907 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 8 V3
Mozilla/5.0 (Linux; Android 7.0; SM-G950F Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 7 Galaxy S8
Mozilla/5.0 (Linux; Android 7.0; Moto G (5) Build/NPPS25.137-93-4; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 7 Moto G5
Mozilla/5.0 (Linux; Android 6.0.1; SM-G900F Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 6 Galaxy S5
Mozilla/5.0 (Linux; Android 6.0.1; Redmi 4A Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.132 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 6 Redmi 4A
Mozilla/5.0 (Linux; Android 5.1; vivo 1707 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 5 Y51 (2015)
Mozilla/5.0 (Linux; Android 5.1; HTC_D628u Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 5 Desire 628 Dual SIM
Mozilla/5.0 (Linux; Android 4.4.2; CHC-U03 Build/HuaweiCHC-U03) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 4 G Play Mini
Mozilla/5.0 (Linux; Android 11; GM1910 Build/RKQ1.201022.002; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/87.0.4280.141 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.0.0.9.116;] Android 11 7 Pro
Mozilla/5.0 (Linux; Android 10; SM-N960F Build/QP1A.190711.020; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/78.0.3904.96 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/228.1.0.10.116;] Android 10 Galaxy Note 9