Pay Monthly Add-ons

Note: This is a historic webpage which may contain out of date information - please the Price Guide for your Plan for up-to-date info.

We offer a range of daily, short-term and long-term Add-ons on our pay monthly and SIM plans. The Add-ons that will be available to buy depend on your plan. The full details of each, and their pricing, can be found in your price guide.

They’re designed to provide you with an extra allowance of units to your inclusive allowance (for voice or data, depending on the Add-on chosen) which you can use in the UK and in our Feel At Home destinations, for calling and getting online unless you’re on one of our new Three Essential plans in which case, your extra allowance of units can only be used in the UK and in our Feel At Home in Europe destinations.

If your Add-on includes an allowance of voice units, which convert on use automatically into minutes, these can be used to:

• call standard UK landlines (starting 01, 02 and 03), UK Mobiles (any network) and your Three voicemail, whether you’re in the UK or one of our Feel At Home destinations (unless you’re on an Essential plan in which case it’s for use in the UK or Feel At Home in Europe destinations only).
• If you're in a Feel At Home in Europe destination you'll also be able to make calls to standard "local" numbers, between our Feel At Home in Europe destinations, at no extra cost.

If your Add-on voice allowance runs out during a call, the remainder of the call will be charged at our standard out of allowance rate, as stated in your Price Guide.

We have the right to suspend, change or withdraw Add-ons, without notice, at any time.

Daily Add-ons

Where available, these can be purchased once every 24 hours, and will expire at midnight on the day of purchase. Included in our Daily Add-on range is our Data Passport which is available for £8 a day in the UK and 78 worldwide destinations (including all of our Feel At Home destinations). If you use a lot of data or just want the best internet experience, the Data Passport was designed for you. It provides an additional unlimited, unrestricted data allowance that can be used in the UK or 78 destinations around the world, for a calendar day, allowing you to use your device as much as you like whether that’s as a personal hotspot, or to browse, stream audio or video in high definition, or connect to Virtual Private Networks (VPNs). It expires at midnight (GMT+1) on the day of purchase. For more information see Data Passport support.

Short-term Add-ons

These are designed to allow you to increase your data or minute allowance, on a one-off short-term basis, until your monthly allowance refreshes (unless we tell you otherwise). Each Short-term Add-on can be purchased once each month, and, if not used up first, will last until the end of the bill cycle you’re in when you buy it. It will then drop-off your account automatically. Any unused allowance will be lost and won’t be rolled over to the following month.

Long-term Add-ons

These are designed to provide you with a new or increased monthly allowance, every month on an on-going basis. It will be applied automatically each month to your account, until you give us one-month notice that you’d like it removed. Any unused allowance will be lost and won’t be rolled over to the following month.