Latest Facebook 136 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; ZTE-Z740 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 4 Z740
Mozilla/5.0 (Linux; U; Android 4.1.2; en-ca; LG-E971 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 4 E971
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/FB4A;FBAV/136.0.0.22.91;] Android 7 Smart E8
Mozilla/5.0 (Linux; Android 7.0; STARNAUTE4 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 7 StarNaute 4
Mozilla/5.0 (Linux; Android 7.0; JERRY2 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 7 Jerry 2
Mozilla/5.0 (Linux; Android 7.0; HUAWEI VNS-L31 Build/HUAWEIVNS-L31; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 7 P9 Lite
Mozilla/5.0 (Linux; Android 6.0; STARNAUTE3 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 StarNaute 3
Mozilla/5.0 (Linux; Android 6.0; STARNAUTE3 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 StarNaute 3
Mozilla/5.0 (Linux; Android 6.0; Orange-Dive72 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/67.0.3396.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Dive 72
Mozilla/5.0 (Linux; Android 6.0; LG-K350 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 K8
Mozilla/5.0 (Linux; Android 6.0; LG-H420 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Spirit
Mozilla/5.0 (Linux; Android 6.0; JERRY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Jerry
Mozilla/5.0 (Linux; Android 6.0; JERRY Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.123 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Jerry
Mozilla/5.0 (Linux; Android 6.0; FEVER Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Fever
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 6.0; ALE-L21 Build/HuaweiALE-L21; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 P8 Lite (2015)
Mozilla/5.0 (Linux; Android 6.0; 4034X Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 One Touch Pixi 4 4"
Mozilla/5.0 (Linux; Android 6.0; 4034D Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 One Touch Pixi 4 4"
Mozilla/5.0 (Linux; Android 6.0.1; SM-N910F Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/136.0.0.22.91;] Android 6 Galaxy Note 4