Si tienes un Jiayu S3, ya puedes instalarle una buena ROM de Android 7.1 Nougat
JIAYU
JiaYu S3 - Specifications
Amazon.com: TUOSHI N300 WiFi Unlocked 4G LTE Modem Router with SIM Card Slot, 300Mbps WiFi, LTE Cat4, EC25-AF Qualcomm Chipset, 5dBi High Gain Antennas, Plug and Play, LT15F : Electronics
Yitouniu WiFi Smart Waterproof Temperature Controller Sensor Module, Tuya app Wireless Remote 16A Smart Switch with Energy Consumption Monitoring, Compatible with Alexa Google Home - Amazon.com