Latest Facebook Lite 18 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.2; es-mx; LG-P708g Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30[FBAN/EMA;FBLC/es_MX;FBAV/18.0.0.4.146;] Android 4 P708g
Mozilla/5.0 (Linux; Android 5.1; XT1033 Build/LPBS23.13-56-2; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_BR;FBAV/18.0.0.4.146;] Android 5 Moto G
Mozilla/5.0 (Linux; Android 5.1; itel it1507 Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36[FBAN/EMA;FBLC/en_US;FBAV/18.0.0.4.146;] Android 5 it1507
Mozilla/5.0 (Linux; Android 4.4.2; VF695 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/18.0.0.4.146;] Android 4 Smart First 6