The EC21-J from Quectel is a Cellular Module with Datarate Download Link LTE-FDD (Mbps) : 10 (DL), LTE-TDD (Mbps) : 8.96 (DL), HSPA+ (Mbps) 42 (DL), WCDMA (kbps) : 384 (DL), EDGE (kbps): 296 (DL), GPRS : 107 (DL), Datarate Uplink LTE-FDD (Mbps) : 5 (UL), LTE-TDD (Mbps) : 3.1 (UL), HSPA+ (Mbps) 5.76 (UL), WCDMA (kbps) : 384 (UL), EDGE (kbps): 236.8 (UL), GPRS : 85.6 (UL), Voltage 3.3 to 4.3 V. Tags: Surface Mount. More details for EC21-J can be seen below.