Freeview HD operates in UK after its successful launch and it is free-to-air services which are also known as DTV services
. The services will be reaching all the regions by the end of 2012. It is a subscription of free digital service of TV. To watch the Freeview you need a digital set top box or IDTV is also ok but it should be with built-in-set-top box.
Upgrade freeview box includes preparations for the future availability of high definition channels on Freeview but you will not be able to use the Freeview equipment which exists to watch HD on Freeview. So there will be a need to buy the new Freeview HD set top box. These set top boxes are yet not available but are expected to come into the market within few months so even if you get one of those new set top box then too you wont get all the access to view until the Digital Switchover is in your region. There are some areas that have the switchover done but all the regions including London the switchover will be finished by 2012.
If you want to retune or pace freeview HD box then you have to follow all the instructions manual which will be with your HD box. To retune your HD box you have to make sure that you continue to receive all the channels which are available to you including the channel Five. Further help if required for pace freeview HD box then you should search it in internet and you will get all the help and instructions to upgrade freeview HD box.