The EC21-AUT from Quectel is a Cellular Module with Datarate Download Link LTE-FDD (Mbps) : 10 (DL), DC-HSPA+ (Mbps) : 42 (DL), WCDMA (kbps) : 384 (DL), Datarate Uplink LTE-FDD (Mbps) : 5 (UL), DC-HSPA+ (Mbps) : 5.76 (UL), WCDMA (kbps) : 384 (UL), Voltage 3.3 to 4.3 V. Tags: Surface Mount. More details for EC21-AUT can be seen below.