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There is no required reading order. Start with the part of mobile life that matters today.
16 question guides
The number stays with you
A PAC is the instruction used when changing UK mobile provider while retaining a number.
Read this question ↗02 / SwitchingWhen you want a different number
A STAC is for a switch where the existing mobile number is not being kept.
Read this question ↗03 / SIM and devicesA profile, rather than a card
An eSIM stores a mobile service profile digitally in a compatible device.
Read this question ↗04 / SIM and devicesOne phone, more than one commitment
A phone and its airtime can sit under different agreements.
Read this question ↗05 / Plans and paymentPut the dates in order
A monthly service has several useful dates: activation, allowance refresh, statement issue and payment collection.
Read this question ↗06 / Plans and paymentCredit, packs and renewals
PAYG is not one universal payment model.
Read this question ↗07 / Plans and paymentGive a bill a second reading
Begin with the period covered by the statement.
Read this question ↗08 / Plans and paymentRead the future change, too
For new contracts from 17 January 2025, Ofcom prohibits inflation-linked or percentage-based rises written into the agreement.
Read this question ↗09 / Connection and travelDescribe what stops working
A signal problem is easier to investigate when the description is precise.
Read this question ↗10 / Connection and travelA postcode is a starting point
A coverage tool models the likely service around a location.
Read this question ↗11 / Connection and travelThe journey changes the question
Before travelling, identify the exact country, the line being used and the intended activity.
Read this question ↗12 / Plans and paymentRead beyond the allowance word
An unlimited allowance can coexist with other conditions.
Read this question ↗13 / Connection and travelA home needs a different check
Fixed broadband and mobile broadband reach a property differently.
Read this question ↗14 / SIM and devicesKeep the keys to yourself
Passwords, one-time codes, eSIM activation details and payment information belong in secure official account journeys.
Read this question ↗15 / DecisionsMake your own comparison sheet
Write down the actual need first: places, normal data use, handset compatibility, international calls and how long the commitment can reasonably last.
Read this question ↗16 / SwitchingThe service ends, the record stays
After a number transfer or cancellation, review the final statement.
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