Latest Facebook Lite 57 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.1; en-gb; HTC PM6014 Build/JRO03H) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30[FBAN/EMA;FBLC/en_GB;FBAV/57.0.0.8.129;] Android 4 PM6014
Mozilla/5.0 (Linux; Android 6.0; VFD 300 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/57.0.0.8.129;] Android 6 Smart Mini 7
Mozilla/5.0 (Linux; Android 5.1; MSP4507 Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.125 Mobile Safari/537.36[FBAN/EMA;FBLC/uk_UA;FBAV/57.0.0.8.129;] Android 5 MSP4507
Mozilla/5.0 (Linux; Android 5.1; LENNY2 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/57.0.0.8.129;] Android 5 Lenny 2
Mozilla/5.0 (Linux; Android 5.1.1; SM-J111F Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/57.0.0.8.129;] Android 5 Galaxy J1 Ace