You will see a 4G icon on your phone indicating that your phone is connected to a 4G network, instead of a tower icon.
Important: 4G/LTE might not be supported by your network service provider or by the service provider you are using
when traveling. In these cases, you may not be able to make or receive calls, send or receive messages or use mobile data connections. To make sure your device works seamlessly when full 4G/LTE service is not available, it is recommended that you change the
highest connection speed from 4G to 3G. To do this, swipe left on the start screen, and tap Settings > cellular+SIM. Switch Highest connection speed to 3G.
For more info, contact your network service provider.
Additional information can also be found on the Lumia 1020
user manual on page 115, under Network services and costs.
Feel free to post back if you need further assistance.
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