← All providers · Last checked 2 November 2026

Three: how to complain, price rises and leaving

A plain-English guide to complaining to Three, its price rises, how to leave and where to go if it doesn't put things right.

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How to complain to Three

Start with Three's customer services, then make a formal complaint if it isn't sorted. Three's complaints process is set out in Three: Complaints. Keep a note of the date you complained and any reference number.

Ofcom says every provider's complaints code must include a phone number, a UK postal address and an email address or web form for complaints.

Three price rises

Three (mobile)

When: 1 April each year. How it's set: Pounds and pence by data allowance. Customers who joined between May 2015 and September 2024 and are out of contract were moved to these terms from April 2026. Latest: From 1 April 2026: £1.80 a month (4GB or less), £1.90 (5GB to 99GB), £2.30 (100GB or more, including unlimited). Device payments don't rise.

Three (home broadband)

When: 1 April each year. How it's set: Pounds and pence. Latest: From 1 April 2026: £3.50 a month.

Ofcom's rules mean price rises in contracts taken out from 17 January 2025 must be set out in pounds and pence. If a rise wasn't set out in your contract, or is bigger than it allowed, Ofcom says the provider must give at least 30 days' notice and let you leave within 30 days without exit fees.

Cancelling or leaving Three

If your minimum term has ended, you can usually leave by giving the notice your contract requires. If you're still in contract, early exit charges may apply, so check first.
Mobile: text "PAC" to 65075 to get a code to switch and keep your number, or "STAC" if you don't want to keep it.
Broadband: Ofcom explains how switching works, including when the new provider arranges the switch for you.
Near the end of your contract, Three must send you an end-of-contract notice with your current and future price and its best deals.

If Three doesn't sort it out

Ofcom lists Three as a member of CISAS, one of the two free alternative dispute resolution (ADR) schemes for phone and broadband. You can go to it once at least six weeks have passed since you first complained, or sooner with a deadlock letter, and within 12 months of a deadlock letter. (For complaints made before 8 April 2026 the wait was eight weeks.)

Free letters

Add Three as the provider and your details fill in the letter for you.

Guides

Quick answers

How do I complain to Three?

Contact Three and make a formal complaint using its complaints code (linked on this page). Ofcom says every phone and broadband provider's complaints code must include a phone number, a UK postal address and an email address or web form.

Which ombudsman covers Three?

Ofcom lists Three as a member of CISAS. It's free to use.

When can I take a Three complaint to CISAS?

Ofcom says you can go to the ADR scheme once at least six weeks have passed since you first complained, or sooner if you get a deadlock letter, and within 12 months of a deadlock letter. CEDR says complaints made before 8 April 2026 needed eight weeks.

Can I leave Three if my price goes up?

If the rise was set out in your contract in pounds and pence, you generally can't leave penalty-free because of it. If it wasn't, or it's bigger than your contract allowed, Ofcom says the provider must give you at least 30 days' notice and let you leave within 30 days without exit fees.

Sources

Last checked 2 November 2026. Policies change, so check the linked pages and your own contract before you act. General information, not legal or financial advice.