4G LTE set top box use the EC20 chip

Mario Technology 4G LTE Android TV box use the Quectel LTE EC20 chip:

About the EC20 chip:

EC20 series is a new generation of Quectel LTE module. Adopting the 3GPP Rel. 9 LTE technology, it delivers 100Mbps downlink and 50Mbps uplink data rates and is fallback compatible with Quectel UMTS/HSPA+ UC20 module in the compact and unified form factor.

4G box