Choose the right support page
Three distinguishes PAYG voice SIM support from PAYG mobile broadband support. Use the category that matches the service you actually have.
Track expiry and balance
Check the pack’s allowance and period, then the credit balance. Read what happens when the pack ends or data is exhausted. Confirm automatic renewal and top-up settings in the official account.
Changes to an existing service
A move between plan types can have account-specific instructions. Ask about the number and remaining credit before replacing a service. Do not assume moving to monthly is just a settings toggle.
SIM format and inactivity
Three publishes PAYG eSIM replacement guidance. Check handset support and account access. For an occasional-use line, read the current inactivity conditions so the number remains usable.
Before you act
Confirm current details directly with the official provider. Our information is independent, general and free of a guidance fee. We do not sell or arrange services.
The official reading list