Latest Facebook Lite 28 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.2.2; pt-pt; ONE TOUCH 4015X Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.2 Mobile Safari/534.30[FBAN/EMA;FBLC/pt_PT;FBAV/28.0.0.2.67;] Android 4 One Touch Pop C1
Mozilla/5.0 (Linux; U; Android 4.1.2; es-la; GT-S6812B Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30[FBAN/EMA;FBLC/es_LA;FBAV/28.0.0.2.67;] Android 4 Galaxy FAME Duos
Mozilla/5.0 (Linux; Android 5.1.1; SM-J700H Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.85 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/28.0.0.2.67;] Android 5 Galaxy J7
Mozilla/5.0 (Linux; Android 5.1.1; LG-K120 Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36[FBAN/EMA;FBLC/pt_PT;FBAV/28.0.0.2.67;] Android 5 Spree