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itelzofoUK mobile guidance
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itelzofo / Sources & editorial approach

Facts from official sources. Guidance in our own words.

We checked the official pages below when preparing this edition on 18 September 2026. Network pages identify their source. Our practical checklists are original general guidance; they are not copied provider instructions or a promise of product availability.

How to read the guides

Each topic begins with a provider-specific note, followed by general explanations and questions. A shared radio network does not establish identical benefits, apps, speed policies or roaming. Where a feature is not verified, we ask you to confirm it rather than claim it exists.

Scope and corrections

The library covers ten selected mobile brands. It is not a live tariff database, a complete record of every historical product or a ranking of providers. We avoid quoting prices because an account-specific quote and contract summary are more reliable for a decision. Contact us if a source has changed.

Primary reference pages

Three official information

O2 official information

EE official information

Vodafone official information

Sky Mobile official information

Tesco Mobile official information

giffgaff official information

SMARTY official information

iD Mobile official information

VOXI official information

Ofcom: switching your mobile provider

Ofcom: bills and charges

Vodafone: completion of the UK merger

Visual materials

The desk image was generated specifically for this project. It is an illustration, not evidence of physical offices, equipment or an advisory team. No carrier logos, customer testimonials or invented business history are used.