Latest Facebook 128 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; LG-E980h Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 4 Optimus G Pro
Mozilla/5.0 (Linux; U; Android 4.1.2; en-nz; GT-I8190T Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 4 Galaxy S III mini
Mozilla/5.0 (Linux; U; Android 4.0.4; en-us; Huawei-H867G Build/HuaweiH867G) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 4 H867G
Mozilla/5.0 (Linux; Android 8.0.0; Pixel Build/OPR3.170623.013; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 8 Pixel
Mozilla/5.0 (Linux; Android 7.0; SM-G920R6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 7 Galaxy S6
Mozilla/5.0 (Linux; Android 7.0; HUAWEI VNS-L31 Build/HUAWEIVNS-L31; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 7 P9 Lite
Mozilla/5.0 (Linux; Android 6.0; VFD 500 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/128.0.0.26.68;] Android 6 Smart Turbo 7
Mozilla/5.0 (Linux; Android 6.0; U FEEL LITE Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 U Feel Lite
Mozilla/5.0 (Linux; Android 6.0; SUNNY 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/128.0.0.26.68;] Android 6 Sunny
Mozilla/5.0 (Linux; Android 6.0; STARTRAIL 8 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/128.0.0.26.68;] Android 6 StarTrail 8
Mozilla/5.0 (Linux; Android 6.0; STARNAUTE3 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/128.0.0.26.68;] Android 6 StarNaute 3
Mozilla/5.0 (Linux; Android 6.0; JERRY 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/128.0.0.26.68;] Android 6 Jerry
Mozilla/5.0 (Linux; Android 6.0; HUAWEI VNS-L31 Build/HUAWEIVNS-L31; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 P9 Lite
Mozilla/5.0 (Linux; Android 6.0; FRD-L04 Build/HUAWEIVAT-L04; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 Honor 8
Mozilla/5.0 (Linux; Android 6.0; FEVER Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.106 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 Fever
Mozilla/5.0 (Linux; Android 6.0.1; VFD 600 Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 Smart Prime 7
Mozilla/5.0 (Linux; Android 6.0.1; SM-G600FY Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/54.0.2840.85 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 Galaxy On7
Mozilla/5.0 (Linux; Android 6.0.1; SM-A700H 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/128.0.0.26.68;] Android 6 Galaxy A7
Mozilla/5.0 (Linux; Android 6.0.1; SM-A300FU Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/56.0.2924.87 Mobile Safari/537.36 [FB_IAB/FB4A;FBAV/128.0.0.26.68;] Android 6 Galaxy A3 (2015)
Mozilla/5.0 (Linux; Android 6.0.1; Redmi 3S 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/128.0.0.26.68;] Android 6 Redmi 3S