Latest Facebook 181 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 9; O61 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 9 O61
Mozilla/5.0 (Linux; Android 8.1.0; Z2 Plus Build/OPM2.171019.029.B1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Z2 Plus
Mozilla/5.0 (Linux; Android 8.1.0; Z2 Plus Build/OPM1.171019.018; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Z2 Plus
Mozilla/5.0 (Linux; Android 8.1.0; W_K400 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.70 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Lenny 5
Mozilla/5.0 (Linux; Android 8.1.0; W_K400 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Lenny 5
Mozilla/5.0 (Linux; Android 8.1.0; W_K300 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Jerry 3
Mozilla/5.0 (Linux; Android 8.1.0; VFD 720 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Smart N9
Mozilla/5.0 (Linux; Android 8.1.0; VFD 720 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Smart N9
Mozilla/5.0 (Linux; Android 8.1.0; VFD 620 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Smart N9 Lite
Mozilla/5.0 (Linux; Android 8.1.0; Pixel 2 XL Build/OPM2.171026.006.H1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Pixel 2 XL
Mozilla/5.0 (Linux; Android 8.1.0; Pixel 2 XL Build/OPM2.171026.006.H1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Pixel 2 XL
Mozilla/5.0 (Linux; Android 8.1.0; ONEPLUS A3003 Build/OPM2.171019.029; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 3
Mozilla/5.0 (Linux; Android 8.1.0; Nokia 1 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 1
Mozilla/5.0 (Linux; Android 8.1.0; MI 8 SE Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Mi 8 SE
Mozilla/5.0 (Linux; Android 8.1.0; LEX820 Build/OPM1.171019.021; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Le Max 2
Mozilla/5.0 (Linux; Android 8.1.0; LEX820 Build/OPM1.171019.018; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Le Max 2
Mozilla/5.0 (Linux; Android 8.1.0; Infinix X623 Build/OPM1.171019.026; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Hot 6X
Mozilla/5.0 (Linux; Android 8.1.0; HTC U11 life Build/OPM1.171019.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 U11 Life
Mozilla/5.0 (Linux; Android 8.1.0; COL-L29 Build/HUAWEICOL-L29; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Honor 10
Mozilla/5.0 (Linux; Android 8.1.0; Aquaris X2 Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/181.0.0.36.82;] Android 8 Aquaris X2