First decide whether the PAYG service will be with the same provider or a different one; the correct process may be an internal migration, a PAC port or a STAC switch.
Choose the outcome
| Outcome | Likely route |
|---|---|
| Keep the number on the same provider’s PAYG service | Ask for an internal migration. |
| Keep the number on another provider’s PAYG service | Request a PAC and give it to the new provider. |
| Take a new PAYG number and close the contract | Use a STAC or the provider’s confirmed closure route. |
| Keep both services | Order PAYG separately and do not submit PAC/STAC. |
Check obligations before switching
- Minimum-term end date and early termination charge
- Separate handset or device finance
- Final bill and account credit
- Any family or multi-line discounts affected by removing the line
- Network lock on an older or imported phone
- PAYG inactivity and top-up rules
- Roaming and Wi‑Fi Calling support on the chosen PAYG tariff
Prepare for PAYG operation
Set up a reliable top-up method, learn how the bundle renews and what happens when credit is insufficient. PAYG plans can differ from monthly plans in 5G, Wi‑Fi Calling, visual voicemail, roaming and customer support. Do not assume that being on the same radio network gives identical features.
Complete and test
- Activate the PAYG SIM/eSIM as instructed.
- Submit PAC only if moving the existing number to another provider.
- Keep the contract SIM until the number is fully working.
- Test calls, SMS, mobile data and voicemail.
- Check the final contract bill.
- Cancel the old Direct Debit only after the provider confirms settlement.
Avoid losing the number later
PAYG numbers can be disconnected after a period without qualifying activity. Check the exact current inactivity rule for the chosen tariff and set a reminder if the number is mainly used as a backup.
The final check that prevents the common mistake
Confirm whether the provider can migrate the number internally or requires a PAC to another service. Check what happens to voicemail, account credit, eSIM and any financed handset. Do not let the monthly line close until the PAYG number has made and received a call and SMS.
- Record the requested migration date.
- Top up and test the PAYG service promptly.
- Check the final monthly bill before cancelling payment arrangements.
Official sources
Facts checked: 25 July 2026. Rules, plan features and menu paths can change. Recheck the current terms for your exact provider, plan and device before acting.
