Smarty complaint?
Make it sting!
We help resolve your complaint! Our AI cyber hornets are trained to help you write an effective Smarty complaint letter, and make sure your case gets taken seriously.
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no complaints in the last 30 days
Smarty customer service
- Contact number
- 0333 3381054
- Customer support
- smarty.co.uk
- Head office
- Hutchison 3G UK Limited, Vodafone House, The Connection, Newbury, Berkshire, RG14 2FN, United Kingdom
- Social media
Contact details checked on 23 Oct 2026
Why use our complaint platform?
Written in minutes
We help you write an effective complaint in minutes. Our AI cyber hornets are trained on thousands of complaint letters that actually worked.
We will make some noise!
Your complaint gets the attention it deserves. Our cyber hornets could post it on social media, send it by printed letter or use other escalation tools at our disposal.
Your personal case coach
Our AI models open a case file and keep coaching after you file: what to reply, when to push, and how to escalate if nothing happens.
You are not alone
Join 73,608 consumers who refused to be ignored. Our community is there for advice while you chase your resolution.
Is Smarty legit?
LegitSmarty is a genuine UK mobile network, run by the company behind Three and using its masts, with rolling monthly plans and no credit check. The catch is help: there is no phone line for everyday problems, so a stalled number transfer or a new SIM that will not connect gets untangled over web chat.
What we checked
- Mobile network since 2017
- Trading name of Hutchison 3G UK
- Registered in England and Wales
- Ratings on other review websites: 4/5
Watch out for
- Patchy signal or slow data where you live or work, as every plan runs only on Three's network.
- A number stuck halfway through a move after your PAC code request, with each follow-up going through chat.
- An unexpected call claiming to be Smarty that asks for your PIN or full security code.
Number stuck halfway through moving to Smarty?
We help you write it, it gets its own public page, and you can have it sent to Smarty as a formal letter.
File a Smarty complaintCommon customer service questions about Smarty
How do I file a complaint about Smarty?
Do you have a dispute or a bad customer experience with Smarty? Report it through our website to maximize the chance of getting it resolved.
We help you write an effective complaint in minutes. Our AI models are trained on thousands of effective complaint letters. Then we push it through emails, social media, paper complaint letters and other tools at our disposal. And you are not alone: our helpful community is there for advice.
How do I contact Smarty customer service?
Smarty customer service runs online rather than by phone: there is web chat with advisers from 8am to 8pm, a bot that answers around the clock, a help centre and a community forum, all reached through the Smarty website. Smarty does not publish a customer service phone number. The only number it prints, 0333 3381054, is on its complaints page and is there to request a call back about a complaint. Have your Smarty mobile number and account email ready when you start a chat.
Number transfer stuck or a payment you do not recognise? Start your complaint here and we push it out to Smarty by email, social media and printed letters.
How do I cancel Smarty and keep my number?
To leave Smarty and keep your number, get a PAC code and give it to your new network, which then moves the number across; if you are moving without the number, ask for a STAC code instead. Every UK mobile network, Smarty included, gives these codes by text through the Text-to-Switch service, and you can also ask for one in chat. Smarty plans are rolling one-month plans rather than long contracts. Keep the text with your code, note the date you asked for it, and check your bank statement for any payment taken after the switch.
How do I escalate a complaint with Smarty?
To escalate a complaint with Smarty, raise it as a formal complaint through the complaints page on the Smarty website and ask for a complaint reference, or request a call back about it on 0333 3381054. Smarty is a trading name of Hutchison 3G UK Limited, the Three UK company, so a letter to head office goes to the registered address shown at the top of this page. Set out the mobile number, what went wrong, the dates and what you want done, and keep every chat transcript.
Complaint that needs to go higher? Start the case through our complaint process and our trained AI keeps coaching you after it is filed: what to reply, when to push and how to escalate if nothing happens.
Can I take a Smarty complaint to the Communications & Internet Services Adjudication Scheme (CISAS)?
Yes. Smarty is one of the companies covered by the Communications & Internet Services Adjudication Scheme (CISAS), run by CEDR, which handles disputes about communication and internet services in the UK. CISAS generally expects Smarty to have had the chance to put things right first, so keep a record of every chat, call back and email.
Not sure how to word it? We help you write the complaint in minutes, drawing on thousands of complaint letters that worked.
Is that call from Smarty real?
Not if it asks for your password, PIN or full security code. Smarty says it does not ring customers for personal details unless they asked for a complaint call-back, and never asks for payment in gift cards or crypto. Fraudsters use calls and texts like these to move a number onto a SIM they control.
What do people complain about most at Smarty?
Nothing has been reported about Smarty here yet. Our research shows what typically goes wrong at online-only mobile networks: number transfers that stall or cut the line, eSIMs and new SIMs that will not activate, payments taken after a plan was cancelled, data and roaming that fall short of the plan, and help that is hard to pin down when support runs through chat and a bot.
Number lost in a switch or charged after you left Smarty? Be the first to report it: your case opens the record for the next Smarty customer caught in the same transfer.
What happens after I submit my complaint?
Your complaint gets its own public page on Complain.biz and we get to work: we bring it to the attention of Smarty through emails, social media, paper complaint letters and other tools at our disposal.
And we stay with it after you file. Our trained AI opens a case file for you and keeps coaching: what to reply, when to push again, and how to escalate if nothing happens.
Can other consumers help me with my Smarty complaint?
Yes. We have an active community of consumers, and complaints here are public: people who ran into the same problem with Smarty can give you advice or back you up with their own story. A complaint with a community behind it is much harder to overlook.
Smarty complaints
Helpful experiences shared by Smarty customers. Search, discuss and connect with other people in our community.
Smarty complaints per month
Dec 2025 - Nov 2026Complaints filed on Complain.biz about Smarty in each of the last twelve months.
No complaints about Smarty yet. Yours can be the first.
How Smarty compares
Smarty customer service compared to others in the Telecom category.
| Company | Complaints | Biggest problem |
|---|---|---|
| Vodafone | 21 complaints | No signal and dropped calls 62% |
| iD Mobile | 5 complaints | |
| Tesco Mobile | 2 complaints | |
| Carphone Warehouse | 1 complaint | |
| Smarty (this page) | 0 complaints | No complaints yet |
| Buymobiles | 0 complaints | No complaints yet |