Latest Facebook 123 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.3; es-us; ZTE-Z777 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 Z777
Mozilla/5.0 (Linux; U; Android 4.3; en-us; ZTE-Z669 Build/JLS36C) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 Z669
Mozilla/5.0 (Linux; U; Android 4.1.2; en-nz; LG-D684 Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 G Pro Lite
Mozilla/5.0 (Linux; U; Android 4.1.2; en-au; LG-E975T Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 Optimus G
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; LG-AS730 Build/IMM76L) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 AS730
Mozilla/5.0 (Linux; U; Android 4.0.3; en-us; LG-L40G Build/IML74K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 4 L40G
Mozilla/5.0 (Linux; Android 6.0; XT1069 Build/MPB24.65-34-3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Moto G
Mozilla/5.0 (Linux; Android 6.0; VFD 500 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Smart Turbo 7
Mozilla/5.0 (Linux; Android 6.0; LG-K350 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 K8
Mozilla/5.0 (Linux; Android 6.0; LG-H900PR Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 V10
Mozilla/5.0 (Linux; Android 6.0.1; ZTE BLADE A512 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Blade A512
Mozilla/5.0 (Linux; Android 6.0.1; Vodafone Smart ultra 6 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Smart Ultra 6
Mozilla/5.0 (Linux; Android 6.0.1; VFD 600 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Smart Prime 7
Mozilla/5.0 (Linux; Android 6.0.1; SM-J510FN Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Galaxy J5 (2016)
Mozilla/5.0 (Linux; Android 6.0.1; SM-G925I Build/MMB29K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 6 Galaxy S6 Edge
Mozilla/5.0 (Linux; Android 5.1; VF-795 Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 5 Smart Speed 6
Mozilla/5.0 (Linux; Android 5.1; LENNY2 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 5 Lenny 2
Mozilla/5.0 (Linux; Android 5.1; APACHE G6 Build/LMY47I) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/39.0.0.0 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 5 Apache G6
Mozilla/5.0 (Linux; Android 5.1.1; SM-J320M Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.15.71;] Android 5 Galaxy J3 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; SM-J320FN Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/123.0.0.18.71;] Android 5 Galaxy J3 (2016)