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How to Cancel Three
To leave Three and keep your number, text PAC and your date of birth (DDMMYY) to 65075, then give the code to your new provider. If you leave before your minimum term ends you may pay an early termination fee, and any device plan balance must still be paid. Consumer Protection UK is independent and is not connected to Three.
At a Glance
Your Rights
What the rules say, with a link to the official source for each.
Leaving Three
Getting Your PAC
Three says if you have one number with it, text PAC and your date of birth (DDMMYY) to 65075. If you have more than one number, call 0333 338 1082. A PAC is valid for 30 days. Home Broadband needs 30 days' notice. source
Charges and Device Plans
Three says you may be charged an early termination fee if you leave before the end of your minimum term. If you cancel your airtime plan with a device plan balance outstanding, it must still be paid in full. Your final airtime bill comes within 38 days of your number moving. source
Your Rights
Changes to Your Terms
Providers can change contract terms, but they must give at least one month's notice, and you have the right to leave without penalty if the change does not benefit you. You cannot leave over changes that only benefit you, are purely administrative or are imposed by law, such as a VAT change. source
Free Dispute Resolution
If your complaint is not resolved, you can use a free alternative dispute resolution (ADR) scheme once six weeks have passed since your initial complaint, or earlier if you receive a deadlock letter. The two schemes are the Communications and Internet Services Adjudication Scheme (CISAS) and the Communications Ombudsman. All providers must belong to one. source
Time Limits to Know
Miss a deadline and you can lose a right. Check the dates on your own paperwork.
- 30 daysThree PAC is validGive it to your new provider in that time
- 38 daysFinal Three airtime billAfter your number moves
- 6 weeksWait before going to a free ADR schemeSix weeks from your complaint, or earlier with a deadlock letter
Steps to Take
Step 1 of 5
Text PAC and your date of birth (DDMMYY) to 65075, or call 0333 338 1082 if you have more than one number.
Step 2 of 5
Check the reply for any early termination fee.
Step 3 of 5
Give the PAC to your new provider within 30 days.
Step 4 of 5
Keep paying any device plan balance.
Step 5 of 5
Check your final bill. If it is wrong, complain to Three, then CISAS after 6 weeks.
(Tap the numbers to reveal steps)
Where to Go If It Is Not Put Right
Your options, in order, and when each one applies.
Your Provider's Complaints Team
Always start here, in writing, and keep a copy.
CISAS or the Communications Ombudsman (ADR)
Six weeks after your complaint, or when you receive a deadlock letter. Free for you. Your provider will say which scheme it belongs to.
Good to Know
Small things that make your complaint stronger.
Device financing complaints go to the Financial Ombudsman Service, not CISAS.
Want Help?
If you would like one of our team to look at your problem, our initial case review is free. We cannot guarantee any outcome and we do not give legal advice.
Lead reviewer
Luke Marley
Founder and Lead Reviewer
Luke founded CPUK in 2026 after seeing how hard it is for ordinary people to get problems with companies put right. He oversees our guides and checks them against official sources.
Research by Katie Burt, Co-founder and Operations Lead (17 years in the care sector, including managing services for vulnerable adults), and the CPUK Research Team. Researched with AI-assisted research tools, then checked and corrected by our team.
Last checked: 13 October 2026. We are not paid by the companies we write about. Adverts never affect our guidance. Read our editorial policy.
Sources and official links
- three.co.uk/support/leave-three/leave-with-your-number Checked 13 October 2026
- ofcom.org.uk/complaints/complain-about-phones-or-internet-services/contracts Checked 12 October 2026