Three UK customer care number: the expert guide to getting help fast

Quick-reference numbers you can trust

Three UK’s customer care is simple to reach, but the number you dial depends on where you’re calling from. The options below are the official, widely used routes into Three’s support teams, covering mobile, SIM-only, and home broadband customers.

• From a Three phone (UK): 333 – free to call from your Three mobile, including Pay Monthly and Pay As You Go.
• From any UK phone (other networks/landlines): 0333 338 1001 – charged at standard UK rate and included in most bundles that cover 01/02/03 numbers.
• From abroad: +44 7782 333 333 – international/roaming charges apply; add the number to your contacts before you travel.

These routes connect you to general customer services for billing, plan changes, technical support, lost/stolen, roaming, and account queries. If your phone is lost or stolen, call immediately to protect your number and allowances.

When to use each number

Dial 333 if you’re calling from a Three handset inside the UK. It’s the fastest way to authenticate your account (the system recognizes your number automatically), and it’s free. Use this for day-to-day tasks like checking your allowance, changing plans, discussing an upgrade, reporting a network issue, or getting help with 5G Home Broadband.

If you’re on another network or a landline, 0333 338 1001 is the right choice. 03 numbers are treated like standard UK geographic calls: they’re typically included in your minutes on most mobile and landline plans, and otherwise charged at your provider’s standard rate. This is especially useful if your Three device is out of battery or you’re calling on behalf of a family member.

From abroad, use +44 7782 333 333. Store it in your phone before traveling. Charges depend on the country you’re in and your roaming setup. If you can’t get through due to local restrictions, try using Wi‑Fi calling or an internet-based calling service to dial the UK 0333 number.

Costs, opening hours, and call tips

Calls to 333 are free from Three mobiles when you’re in the UK. Calls to 0333 338 1001 are charged as standard 01/02/03 calls and are usually included in bundled minutes; check your provider’s terms if you’re unsure. From overseas, calls to +44 7782 333 333 use roaming minutes if applicable, or incur international rates. 0800 numbers (where listed on Three’s site for sales or specific campaigns) are free to call within the UK from mobiles and landlines.

Typical opening hours for phone support run during daytime and early evening UK time, with reduced service at weekends and on bank holidays. For the latest daily hours, check three.co.uk/contact-us before you call. If you want to avoid queues, aim for mid-morning Tuesday–Thursday. Have your account PIN or memorable information ready; if you’re calling from a non-registered number, also have the account holder’s full name, billing address, and last 4 digits of the payment card available to pass security.

Useful tip: you can check network status for your postcode before calling at three.co.uk/support/network-and-coverage/network-status, which can save time on signal or data-speed queries. If there’s a known outage, the status page will show estimated resolution times.

Alternatives to calling (often faster)

Three offers strong digital support options that can solve most issues without waiting on hold. These are ideal for plan changes, add-ons, roaming setup, and billing queries—especially outside phone-line opening hours.

• My3 app and web: Manage plans, see usage, pay bills, and change settings at three.co.uk/my3.
• Live Chat: Available via three.co.uk/contact-us; agents can perform almost all account actions and share transcripts.
• Social media: @ThreeUKSupport on X (Twitter) and Facebook Messenger for non-account-specific guidance (never share full personal data publicly).
• Report scam texts/calls: Forward suspicious texts to 7726 (free) and block the sender; Three and UK networks use 7726 to shut down fraud.
• Accessibility (text relay): Use the Next Generation Text service by dialing 18001 0333 338 1001 through the NGT app for real-time text relay with an adviser.

If you’re traveling, Live Chat over Wi‑Fi often beats calling from roaming networks. For device diagnostics, agents may send configuration profiles or APN settings directly during the chat, and you’ll keep a record of instructions.

Lost or stolen phones: act immediately

If your phone or SIM is lost or stolen, call 333 (UK) or +44 7782 333 333 (abroad) right away. Ask the agent to bar the SIM and device IMEI to stop unauthorized usage. You can find your IMEI on the box, in your purchase email, on your My3 account, or by dialing *#06# on most devices (if you still have access).

File a police report as soon as possible to get a crime reference number—your insurer will likely require this. If you have Three Insurance or another policy, check the claim window (many policies require claims within 24–48 hours) and excess amounts. When you’re ready, the team can help with SIM replacements, number retention, and device replacement options.

After blocking, monitor your My3 account for any unusual activity. If you later recover the device, contact Three to lift the bar and reactivate service.

Roaming and travel help

Before you travel, use Live Chat or 333 to confirm roaming availability for your destination and any daily charges. Three’s Go Roam destinations typically carry a daily roaming charge for customers who joined or upgraded on/after 1 October 2021 (£2/day in Go Roam in Europe, £5/day in Go Roam Around the World). Fair-use data limits often apply; check your plan’s current terms.

From abroad, calling +44 7782 333 333 reaches customer care if you need support with roaming bars, spend caps, or add-ons. If you can’t place voice calls, use hotel/venue Wi‑Fi to reach Live Chat. Keep your voicemail PIN set before you travel; some countries require it for remote voicemail access.

Tip: verify your APN settings (three.co.uk/support) if data doesn’t connect on arrival. Power-cycling your phone and manually selecting a partner network can also resolve registration issues.

Upgrades, cancellations, PAC/STAC switching

For upgrades or to discuss early upgrade fees, call 333 or use Live Chat; agents can quote exact costs based on your contract start date and remaining months. Three often runs promotional pricing on SIM-only or 5G Home Broadband for existing customers—ask for current loyalty offers.

To leave or move your number, use Ofcom’s Text-to-Switch: text PAC to 65075 to receive your Porting Authorisation Code within 60 seconds; give this to your new provider to transfer your number. If you want to close the line without keeping your number, text STAC to 75075. For plan details without committing, text INFO to 85075. These texts are free in the UK.

If you’re on a fixed-term contract, early termination charges may apply; the agent can provide an itemized breakdown. For home broadband, return any router if required to avoid non-return fees; ask for a returns label or drop-off code.

Complaints and escalation

Start by contacting 333 or 0333 338 1001 and asking for the complaints team, or use the online complaints route at three.co.uk/complaints so your case is logged with a reference. Provide dates, screenshots, and any engineer or case IDs you’ve been given. Three will acknowledge your complaint and aim to resolve it promptly, keeping you updated.

If you reach “deadlock” (Three issues a deadlock letter) or 8 weeks pass without resolution, you can escalate free of charge to Ombudsman Services: Communications, the independent Alternative Dispute Resolution (ADR) scheme for Three. Contact: ombudsman-services.org/sectors/communications, 0330 440 1614, Ombudsman Services: Communications, PO Box 730, Warrington, WA4 6WU.

For formal correspondence, Hutchison 3G UK Limited (Three) is registered in England & Wales (No. 03885486). Registered office: 450 Longwater Avenue, Green Park, Reading, Berkshire, RG2 6GF. Always include your Three account number, contact details, and preferred resolution when writing.

Why these details matter

Using the correct Three UK customer care number helps you avoid unnecessary charges, pass security faster, and reach the right team the first time. Whether you’re managing a plan, traveling, or handling an urgent lost/stolen case, the routes above are the most reliable paths to a quick fix.

Bookmark this guide and add the numbers to your contacts now—333 (UK), 0333 338 1001 (UK any network), and +44 7782 333 333 (abroad)—so support is always one tap away.

Does Three have a free phone number?

Welcome to the Three Community. You can reach the Support Team on 333 from any Three phone, or if you’re calling from any other line, you can reach them on 0333 338 1001 which is a standard land line number, free to call from any line that has free landline calls.

What is the customer service hotline of 3HK?

12. To terminate the Service, the customer must notify 3HK/ 3SUPREME by calling the Customer Service Hotline 1033/ 3SUPREME Hotline 31668866 not less than seven days before the then current statement cutoff date of the Service.

What is the number for Three international customer service?

Shipping Address – III International. Please provide a referral ID. If you do not have a referral ID; we recommend that you reach out to the person who referred you to this site and request their ID number. Alternatively, you may contact our customer support team at 1-385-333-3388.

How to contact Three customer service in the UK?

Call us

1. From your Three phone. 333.
2. From any other phone. 0333 338 1001.
3. From abroad (standard roaming rates apply) +44 7782 333 333.