Nokia Lumia 920 - My network service provider told me that they are launching my Nokia Lumia phone as LTE ready, what does that mean? Can LTE or 4G be enabled later?

Nokia Lumia smartphones can be launched as LTE ready, if LTE (4G) services are not yet offered by your network service provider. LTE functionality (4G option in phone settings) can later be enabled with a software update.What's more, your Lumia phone is equipped with over-the-air updating so you don’t need any cables for the update. Just follow the update prompts on your phone screen – the easiest way to keep up to date with the latest enhancements.