04 Aug 2026

Payments, price plans and billing

How do I pay for my Mozillion SIM or phone plan?

When you order your SIM or phone bundle, you will set up your payments. Payments for SIM only plans are taken from your bank account using GoCardless on a recurring monthly basis. Payments are taken 3 days before the start of the next billing period.

If you purchase via PayPal, they have their own terms and conditions which are confirmed when you order.

How can I change my price plan?
Simply contact our customer team at [email protected], and we’ll guide you through your options.
When will my plan renew?
Your plan and allowances will renew on your monthly connection date.
Can I add more data to my plan?
Yes, If you require a data add on or top up, you can view the available top ups through your Mozillion Dashboard. Just log in, go to Your Dashboard tab and scroll down to your wallet. There, you can see all available top ups from £10 to £100.
Can I use my phone abroad with my plan?

Yes. In selected countries. Your plan includes EU roaming as standard, but there are limits on how much of your data allowance you can use.

If you’re travelling outside these limits, you can also use our Mozillion Travel eSIM for additional coverage and data while abroad.

For full details on roaming allowances and policies, please see our Roaming & Travel section.

My payment won’t go through at checkout

If your payment is being declined or stuck at checkout having correct details, here are some possible reasons and solutions:

  • Card acceptance: Make sure your card is a major UK credit or debit card accepted by Mozillion. Payments are processed through our current payment partners, so the card must be valid and supported.
  • Bank restrictions: Your bank or card issuer may have placed restrictions or blocks on your card for online or international transactions. Contact your bank to confirm there are no holds or security blocks.
  • Affirm credit check: If you are using Affirm for 0% finance and fail the credit check, the payment will not go through.
  • Technical issues: Try using a different browser or device, or clear your browser cache and cookies to rule out any technical glitches.
I’ve paid what I owed — how do I reactivate my suspended plan, and when will it be active again?

Once you have paid your outstanding balance, you can reactivate your suspended Mozillion plan by complying with Mozillion’s requirements. After suspension, you have a 3-month period to restart the service. If the suspension does not lift automatically after payment, contact Mozillion Customer Service for assistance.

Can I change the date my payment or direct debit is taken each month?
Mozillion does not offer an option to change the date your payment or direct debit is taken each month.
How do I use or enter a discount code, including after I’ve already started checkout?

To enter a discount code on Mozillion, follow these steps:

  • During the checkout process, look for the field labeled “Got a voucher code? Enter it here.” on the Checkout page.
  • Enter your discount code into this field.
  • Click “Apply Code” to activate the discount and see the updated price.

If you have already started checkout and missed entering the code initially, you can still go back to the discount code field before completing your payment and apply it.

Important: Make sure to apply the discount code before finalising your purchase, as codes cannot be added after the order is placed.

I cancelled my plan but was still charged
If you cancelled your Mozillion Plan early, especially a 12 or 24 month plan, you may still be liable for a cancellation charge covering the remainder of your contract term. For example, if you terminate a 12-month plan at month 9, you would owe the charges for the remaining 3 months.
Can you refund the difference between what I paid and a cheaper deal I’ve since seen?
Mozillion does not offer refunds for the difference in price if you find a cheaper deal after your purchase. Prices are fixed at the time of your transaction, and there are no partial refunds or price adjustments for deals found later.
Can you buy out my existing contract with another provider so I can switch?

Mozillion does not offer to buy out your existing contract with another provider. If you want to switch before your current contract ends, you may need to pay an early termination fee.

Can I pay extra to upgrade my phone mid-contract?

You can manage your plan and upgrades via your Mozillion Dashboard.

  • Log in to your Mozillion Dashboard by clicking the person icon in the top-right corner of the website.
  • If you have a Pay Monthly or SIM-only plan, you can view your upgrade options in the Manage plans section. Scroll to the bottom and view the Upgrade my plan options you have available.
  • For upgrading your phone itself mid-contract, contact Mozillion to discuss your available options.
How do I downgrade my Mozillion data allowance or plan?

You can downgrade your Mozillion data allowance to reduce your data for the next billing period by logging into your Mozillion account dashboard. Here’s how to do it:

  • Log in to your Dashboard by clicking the person icon in the top right corner of the website.
  • Go to Manage plan. Scroll to the bottom where you will find options to change your plan.
  • Select the plan with the lower data allowance that suits your needs.
  • Confirm the change, which will take effect from your next billing cycle.

You can reduce your data allowance at any time. However, if you are on a 12 or 24-month plan, the contract length cannot be reduced during the term and can only be upgraded. If you want to move from a 24-month plan to a 12-month plan, you will need to wait until you have one month remaining on your current contract before making the change.

If you need any assistance or want to explore your options, you can also contact Mozillion customer support at [email protected].

What happens if I do not pay my bill?

If you do not pay your bill for a Mozillion SIM card, even if you are not using the SIM, Mozillion may suspend or disconnect your service without notice. This can happen if your account is in arrears or if you have not refilled your account after your credit has expired for an extended period.

Additionally:

  • If you continually do not use the service or fail to top up after your credit expires, your service may be suspended.
  • After suspension, you have a 3-month period to restart the service by complying with Mozillion’s requirements.
  • If the service remains unpaid and inactive beyond this period, it may be disconnected permanently.

Please note: Any outstanding bills may be passed to our collection department.

Data add-on / bolt-on / top-up hasn't shown up or activated?

If your add-on, bolt-on, or top-up is not showing up in your Mozillion Dashboard, please check the following:

  • Ensure you have completed the payment and received a confirmation email.
  • Log out and log back into your Mozillion Dashboard to refresh your purchase data.
  • Check your Purchase History in your Mozillion Dashboard to confirm the add-on purchase is recorded.

If the add-on still does not appear after these steps, please contact Mozillion customer service with your payment confirmation so they can assist you further.