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Help Centre

SIM Card, eSIM Plan Help

Need help with your Mozillion SIM card or plan? You’re in the right place.

Getting started Data, calls & roaming Billing & support

Getting started

Joining Mozillion Mobile

How to order your SIM card, plus everything you need to know about delivery.

Keeping Your Number

How to get your PAC code and port your number to or from Mozillion.

SIM Card & eSIM Installation

Step-by-step help getting your physical SIM or eSIM up and running.

Data, calls & roaming

Data and Internet Access

5G and 4G explained, plus help getting connected to the internet on your phone.

Calls & Texts

See exactly what’s included and excluded in your call and text allowances.

Roaming Abroad

Want to use your phone abroad? Here’s everything you need to know.

Travel eSIM Help

Help and guides for getting set up on your Mozillion Travel eSIM.

Billing & support

Payments, Plans & Billing

Help and FAQs for payments, price plans, payment methods and billing.

Wallet Top-up

Help and FAQs to assist you with topping up and using your Mozillion wallet.

Coverage Checker

Check mobile signal strength in your area before you order.

Contact Us

Need to talk to us? Please get in touch — we’re here to help.

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©2026 Mozillion. All Rights Reserved.

Mozillion Limited is authorised and regulated by the Financial Conduct Authority (Firm Reference Number: 981726) and acts as a credit broker and is not a lender, offering regulated credit products provided exclusively by Affirm U.K. Limited. Credit subject to credit check. Terms apply. U.K. residents only, 18 and over. Registered office: 15 West Street, Brighton, England, BN1 2RL.

Affirm U.K. Limited provides consumer credit products and is authorised and regulated by the Financial Conduct Authority (“FCA”) for carrying out regulated consumer credit activities (firm reference number 756087). Company number 10199101, with its registered office at C/O TMF Group, 1 Angel Court, 13th Floor, London, EC2R 7HJ . Affirm is the trading name of Affirm U.K. Limited.

PayPal Credit and PayPal Pay in 3 are trading names of PayPal UK Ltd, 5 Fleet Place, London, United Kingdom, EC4M 7RD. PayPal Credit: Terms and conditions apply. Credit subject to status, UK residents only, Mozillion acts as a broker and offers finance from a restricted range of finance providers. PayPal Pay in 3 is not regulated by the Financial Conduct Authority. Pay in 3 eligibility is subject to status and approval. 18+. UK residents only. Pay in 3 is an unregulated credit agreement. Check if affordable and how you will repay. May make other borrowing more difficult or expensive. See product terms for more details.

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Kill Your Bill: How it works

Shop away your phone bill.

Use our app at over 200 leading brands for the spending you already do. Get an instant reward to shrink or even wipe out your Mozillion bill every time, every month.

01

Pick your plan

Choose a Mozillion plan with Kill Your Bill included, and download our Mozillion app.

02

Open the app before you shop

Pick a gift card for where you're heading — Sainsbury's, Costa, ASOS, IKEA, and 220+ others.

Takes 10 seconds
03

Pay with the gift card as normal

Same shop. Same basket. Same total. Nothing changes except Mozillion fires a reward straight at your phone bill.

04

Watch your phone bill disappear

Rewards stack automatically. Credit rolls over if you go over. Most users hit £0 within their first month.

Avg. user hits £0 in week 3