Latest Facebook Lite 22 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 4.1.2; es-la; GT-S6810L Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30[FBAN/EMA;FBLC/es_LA;FBAV/22.0.0.9.100;] Android 4 Galaxy FAME
Mozilla/5.0 (Linux; U; Android 4.1.2; en-us; HUAWEI C8813DQ Build/HuaweiC8813DQ) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30[FBAN/EMA;FBLC/en_US;FBAV/22.0.0.9.100;] Android 4 C8813DQ