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Mozillion Review
EE-based MVNO that sells phone contracts, SIM-only plans, and refurbished phones with uncapped 5G speeds and free EU roaming.
Pros & Cons
Pros
- EE network quality with genuinely uncapped 5G speeds, often faster than EE's own speed-capped plans
- Free EU roaming included on all plans across 41 countries unlike EE which charges extra
- No mid-contract price rises guaranteed on all plans
- Sells phone contracts with new and refurbished handsets alongside SIM-only deals
- No credit check required for SIM-only plans
Cons
- Very limited account management with no dedicated app and a basic web dashboard that cannot show usage or change payment details
- Customer service has limited phone hours at weekday 9am to 5pm only and live chat is bot-only
- EU data roaming is capped at 25% of plan allowance, restricting heavy data users abroad
- No included global roaming outside the EU without pre-purchasing wallet credit
Mozillion Overview
Mozillion is a UK mobile provider running on EE's network that combines SIM-only plans, phone contracts, and a refurbished phone marketplace into a single platform. Based in Brighton, the company has grown to over 5,700 Trustpilot reviews since launch.
What distinguishes Mozillion from most MVNOs is that it actually sells phone contracts with handsets, including both new and refurbished devices. Customers can buy a Samsung Galaxy S26 or iPhone 17 on a pay-monthly plan, or pick up a quality-tested refurbished phone with a 90-point lab guarantee. This puts Mozillion closer to a full mobile retailer than a typical SIM-only MVNO.
All plans run on EE's network with uncapped 5G speeds, a notable advantage since EE itself caps speeds on most of its own plans. EU roaming is included on all plans across 41 countries, and the company guarantees no mid-contract price rises.
Coverage & Speed
Mozillion provides coverage through EE's network, identical to direct EE customers. EE has the widest 4G coverage in the UK at approximately 99.8% population coverage and 5G reaching around 66% of the population as of late 2025, expanding towards 99% by 2030.
Plans & Pricing
Mozillion offers SIM-only plans on 30-day rolling, 12-month, and 24-month contracts, plus pay-monthly phone contracts with new and refurbished handsets. All plans include unlimited calls and texts, uncapped 5G, EU roaming, and no price rises.
Roaming
EU roaming is included free on all plans across 41 countries with unlimited calls and texts. Data roaming is capped at 25% of the plan allowance, up to a maximum of 25GB. For non-EU countries, Mozillion offers a wallet top-up system and separate travel eSIMs covering over 200 countries.
Our Verdict
Mozillion is a well-rounded mobile provider that offers more than the typical MVNO. The combination of uncapped 5G on EE, free EU roaming, phone contracts, and a refurbished phone marketplace creates a compelling package, particularly for customers who want a one-stop shop for both a device and a plan.
The pricing is competitive across the board, and the no-price-rise guarantee adds welcome certainty. The 4.2 Trustpilot rating from nearly 6,000 reviews indicates generally reliable service.
The main weakness is the poor account management experience. The lack of a proper app, limited web dashboard, and bot-only live chat feel behind the times. Customer service phone hours are also restrictive. For customers who are comfortable managing things via email and do not need 24/7 support, Mozillion delivers strong value on the UK's best network.
Quick Specs
Phone contracts are available with new and refurbished handsets from Apple, Samsung, and Google. Examples include refurbished Samsung Galaxy A55 from around twenty-two pounds per month and new iPhone 17 models. Refurbished devices come with a 90-point lab test guarantee.
SIM-only plans range from 1GB at four pounds per month on a 24-month contract up to unlimited data at twenty-three pounds on a rolling contract. Data-only SIMs and mobile broadband SIMs are also available.