Latest Facebook Messenger 147 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; vivo Y15T Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 4 Y15T
Mozilla/5.0 (Linux; U; Android 4.2.2; en-us; Micromax A47 Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 4 A47
Mozilla/5.0 (Linux; U; Android 4.1.2; pt-pt; LG-P875 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 4 Optimus F5
Mozilla/5.0 (Linux; Android 8.0.0; ONEPLUS A3003 Build/OPR6.170623.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 8 3
Mozilla/5.0 (Linux; Android 7.1.2; TA-1021 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 6
Mozilla/5.0 (Linux; Android 7.1.2; Mi A1 Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Mi A1
Mozilla/5.0 (Linux; Android 7.1.1; VFD 710 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Smart V8
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; VFD 510 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.1.1; SM-N950F Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Galaxy Note 8
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510FN Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; SM-J510F Build/NMF26X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 7.1.1; MI MAX 2 Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Mi Max 2
Mozilla/5.0 (Linux; Android 7.1.1; F8331 Build/41.2.A.7.35; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Xperia XZ
Mozilla/5.0 (Linux; Android 7.1.1; F5121 Build/34.3.A.0.238; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Xperia X
Mozilla/5.0 (Linux; Android 7.1.1; E6653 Build/32.4.A.1.54; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Xperia Z5
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_Z01BD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 ZenFone 3 Laser
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_X00LDA Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 ZenFone 4 Selfie
Mozilla/5.0 (Linux; Android 7.1.1; ASUS_X00DD Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 ZenFone 3 Max
Mozilla/5.0 (Linux; Android 7.1.1; Aquaris U Lite Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/147.0.0.25.86;] Android 7 Aquaris U Lite