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Guidance collection
Network guidance: choose a document
Independent guidance documents for each main UK network, plus dedicated coverage-and-signal pages. All general information; all verified against the July 2026 review date.
Independence notice
Thirdgreenovo is an independent third-party information service. We are not affiliated with, authorised by, or acting for any network named on this page. Trade marks belong to their owners and identify the subject of guidance only. For account, billing or contract matters, contact your network's official customer service. Calls to our line are standard geographic rate and provide general guidance only.
Main networks
Guidance: Three UKBackground, the VodafoneThree merger, common questions, joining and leaving.
Three: coverage & signalChecking coverage properly and fixing weak indoor signal on Three.
Guidance: O2The network behind many virtual brands; satellite messaging trials; common questions.
O2: coverage & signalAlso covers Tesco Mobile, giffgaff and Sky Mobile users — same masts.
Guidance: Sky MobileHow a virtual network works, the data Roll piggybank, support routes.
Guidance: EEThe UK's largest network, 5G standalone (5G+), BT bundles, joining and leaving.
EE: coverage & signalReading the 4G/5G/5G+ layers honestly and fixing weak spots.
Cross-network guides
Checking coverage properlyThe five-step check that prevents most coverage regret.
Switching: PAC & STACLeave any network with one free text — full walkthrough and your rights.
Wi-Fi CallingThe free fix for indoor dead spots, on any network.
eSIM guideHow digital SIMs work and the security habits that matter.
Roaming abroadAvoiding bill shock now networks set their own roaming rules.
Complaints & rightsThe 8-week rule, deadlock letters and the free ombudsman.