It is good news for the users of Lumia devices. To enable the owners to use their Lumia smartphones on 4G LTE networks, the Lumia devices are being updated. This latest OTA update that enables 4G LTE update is now available on the following devices : Lumia 1520, Lumia 1320, Lumia 1020, Lumia 930, Lumia 925, Lumia 920, Lumia 830, and Lumia 625.
The users of above Lumia devices can either install the latest update through the Push Notification or go to Settings > Phone update > Check for Update to manually download it. Then go to Settings > Mobile + SIM to enable 4G.