You can see details of all our calling plans at www.bt.com/callingplans >
All new and existing residential calling plan customers can upgrade to a different calling plan.
If you have an existing calling plan, you can also take out an 'add-on' - for example, International Freedom or Friends & Family International.
If you have a BT ID, log in at My BT and click on Calling Plan to see your upgrade options.
Terms and conditions apply.