In cellular communication, the frequency bands used vary depending on the carrier (such as AT&T, Vodafone, etc.) and the communication method (3G, 4G LTE, etc.).
Soracom IoT SIMs can connect to different carriers and communication methods depending on the subscription, but they do not restrict the frequency bands that can be used. The supported frequency bands vary depending on the module of the IoT device. Refer to the manual of your device for details.
To learn about precautions when using Soracom IoT SIMs with various IoT devices, refer to the following document: