Primarily because many devices rely solely on 2G, especially for M2M or telemetry services. These services are crucial as they are used to remotely monitor and control machines and processes. For example, they are used to collect toll data for trucks, remotely monitor and manage utility infrastructure, and many other professional applications.

• If you have a recent device, it's highly likely that you are already using the 4G network. Modern devices automatically switch to the best available network without you needing to worry about it.
• If you are still using an older mobile phone, the 2G network will continue to support some low-speed data services. However, you will notice a difference once the 3G network is phased out.
  We recommend upgrading to a 4G-compatible device, it will bring you a better speed connection and allows you to still use your phone abroad where more and more 3G networks are disappearing as well.

Proceed as follows to check if your cell phone is 4G compatible:

iOS:
Go to Settings > Mobile data - Mobile Data Options > Voice & data. If the 4G option appears, your device is compatible.

Android:
Depending on your device model, proceed as follow:

• Go to Settings > Connections > Mobile Networks > Network mode. If the 4G option appears, your device is compatible.
• Go to Settings > Mobile Network > SIM1 > Preferred Network Type. If the 4G option appears, your device is compatible.