Latest Facebook Lite 45 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 7.0; 5061 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36[FBAN/EMA;FBLC/id_ID;FBAV/45.185.249.39 Android 7 5061
Mozilla/5.0 (Linux; Android 5.1.1; Redmi 3 Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36[FBAN/EMA;FBLC/ru_RU;FBAV/45.0.0.8.70;] Android 5 Redmi 3
Mozilla/5.0 (Linux; Android 4.4.4; HM NOTE 1S Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36[FBAN/EMA;FBLC/ru_RU;FBAV/45.0.0.8.70;] Android 4 Redmi Note 4G