Cancel Three Mobile Broadband the easy way

Overview

Three Mobile Broadband provides 4G and 5G home and mobile broadband plans in the United Kingdom with options for unlimited data on multi month or rolling-month contracts. Three offers both long term 24 month plans and 1 month plans with different upfront costs.

Who uses it

Three targets consumers and small businesses that need mobile-first home internet or portable 4G/5G hubs where fixed-line full fibre may not be available.

Company facts

Web

1. Go to Three support or your account and sign in.
2. Find the 'leave home broadband' or 'manage service' section.
3. Follow the on-screen cancellation steps and submit your Home Broadband number when asked.
4. Save the confirmation email or screenshot of the confirmation.

iOS

1. Open the Three app if installed and sign in using your account credentials.
2. Open account settings, select the Home Broadband service and choose 'leave' or 'cancel'.
3. Complete on-screen prompts and capture confirmation.

Android

1. Open the Three app on Android and sign in.
2. Select the Home Broadband product and choose 'leave' or 'cancel'.
3. Record the confirmation email or message.

Phone

1. Have your Home Broadband number ready; Three requires this to identify the account.
2. Call Three customer service via the number shown on your bill or support page.
3. Tell the advisor you want to cancel and confirm the 30 day notice applies.
4. Ask for a confirmation reference and a confirmation email; keep the reference for records.

Email and Post

1. Write a clear cancellation request including your Home Broadband number and account holder name.
2. If emailing, include all account identifiers and await a reply; keep sent email copy.
3. If posting, send a signed letter by recorded delivery to Three Mobile Broadband, 20 Grenfell Road, SL6 1EH Maidenhead, United Kingdom.
4. If cancelling within the cooling-off period, the contract is cancelled from the date the letter is posted; keep the proof of postage.

Official cancellation instructions are available on Three's support page: Three leave home broadband.

Moving - service not available at new address

Three does not publish a specific retail rule for cancellations when you move. If the new address cannot receive Three Home Broadband, customers should contact Three with the Home Broadband number and the new address. If Three cannot provide service at the new property, cancellation conditions will be confirmed by the advisor. Required proof documents: proof of new address (tenancy agreement or utility bill) - Not published by Three Mobile Broadband.

Price increase

If Three increases your monthly charge and you did not accept that increase in your contract terms, UK law allows rights to reject significant unilateral changes. Three's published terms include permitted increases; where a change breaches contract terms or is unfair you can challenge it. Required proof documents: copy of original contract and the notification of increase. Applicable law: Consumer Rights Act 2015.

Death of the subscriber

Three's public materials do not publish a step by step for bereavement cancellations for Home Broadband. Contact Three support and be prepared to provide a death certificate and proof of your authority to act on the estate. Required proof documents: death certificate and proof of authority - Not published by Three Mobile Broadband.

Legitimate ground (poor service, not as described)

If the service is not provided with reasonable care and skill, you can request remediation or cancellation under the Consumer Rights Act 2015. Required proof documents: speed tests, times and dates of outages, screenshots of errors. Applicable law: Consumer Rights Act 2015.

End of minimum commitment

If your contract reaches its minimum term (for example 24 months) you can leave without paying an early termination fee at or after that date. Required proof documents: final bill or account statement showing contract end date - Not published by Three Mobile Broadband.

Cancellation within the 14 day cooling-off period

For contracts concluded online or off-premises, you have a 14 day cooling-off period under the Consumer Contracts Regulations 2013. If you cancel during this period, the contract is cancelled from the date you give notice. If service started and you used it, Three can charge for the service used. Refunds must be issued within 14 days of cancellation notice. Required proof documents: cancellation notice (email or recorded delivery) and any return receipts. Applicable law: Consumer Contracts Regulations 2013.

Before you cancel: negotiate

Contact Three customer service and ask to speak to the retention team. Explain that you plan to leave and request a retention offer or new pricing. Research did not publish specific retention offers available from Three Mobile Broadband. If no written offer is provided, request a written confirmation of any concession and do not accept verbal-only terms.

How much you save by cancelling

Example plan and yearly cost calculations from Three's published price guide effective 19 April 2026:

5G Mobile Broadband (24 months, up to 100Mbps) - £28 per month. Yearly cost calculation: 28 x 12 = £336 per year.

4G Mobile Broadband (24 months) - £22 per month. Yearly cost calculation: 22 x 12 = £264 per year.

Cheapest competitor from research: Hyperoptic at £17 per month. Yearly cost calculation: 17 x 12 = £204 per year.

Potential saving by switching from Three 5G £28 to Hyperoptic £17: 336 - 204 = £132 per year.

Potential saving by switching from Three 4G £22 to Hyperoptic £17: 264 - 204 = £60 per year.

Use these concrete figures when negotiating and ask a retention advisor to match or beat the competitor price in writing.

Key UK consumer protections

The Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013 give a 14 day cooling-off period for contracts concluded online or off premises. The Consumer Rights Act 2015 requires services to be performed with reasonable care and skill and protects against unfair contract terms.

Refunds and equipment

Refunds owed after cancellation must be issued within 14 days of notice. Three publishes that refunds over 50p are processed to the bank account or card used for payment within 14 days. Fees for unreturned or damaged hub equipment are published examples: £350 if equipment is not returned within the cooling-off period, £105 if outside the cooling-off period. If you dispute a refused refund, escalate to Citizens Advice and the relevant ombudsman. Useful guidance: Citizens Advice cancelling contracts.

How to escalate

First complain to Three with your evidence and keep records. If unresolved, complain to the Communications Ombudsman or seek remedies via chargeback or Section 75 of the Consumer Credit Act where the payment qualifies. The Competition and Markets Authority publishes guidance on unfair auto-renewals and hard-to-cancel subscriptions and can be contacted for systemic issues.

Return equipment

If you received a hub (4G or 5G Hub) return it according to Three's returns policy to avoid equipment charges: example fees published are £350 if not returned within the cooling-off period and £105 if returned damaged or outside the cooling-off period.

Check final bill and refund

Review your final bill for remaining charges or credits. Three states refunds over 50p will be paid to the bank account or card used within 14 days of the final bill. Refunds less than 50p require contact with customer service.

Keep records and proof

Keep the cancellation confirmation, recorded delivery receipts, chat transcripts and any email replies. These documents are required if you escalate the case to Citizens Advice or an ombudsman.

Reactivation and new service

If you want to re-subscribe later, note that new plan prices may differ. Consider switching credits or setup offers from competitors when moving to a new provider.

Follow this checklist when cancelling your Three Mobile Broadband service.

• Find your Home Broadband number on your bill - Three requires this to cancel.
• Decide your cancellation channel (phone is fastest).
• Contact Three and request cancellation; ask for a confirmation reference and save it.
• If posting, send a signed letter by recorded delivery to: Three Mobile Broadband, 20 Grenfell Road, SL6 1EH Maidenhead, United Kingdom.
• If within 14 day cooling-off, post the letter; the contract is cancelled from the date of posting.
• Prepare to return any hub; keep proof of postage and follow Three returns policy to avoid equipment fees of up to £350 or £105 as published.
• Check final bill and expect refunds over 50p within 14 days to the payment method used.
• If you dispute any fee, gather evidence and escalate via Citizens Advice and the Communications Ombudsman.