Moving your landline number to ONSIM is a straightforward process, but accuracy is key to avoiding failed port fees. This guide walks you through each section of the porting form to ensure your request is accepted by your current provider on the first attempt.
Section 1 - Reseller information
Section 2 - Address and Numbers
Section 3 - Customer details
Section 4 - Signature
⚠️ Reminder: The person signing must be the named account holder or an authorised officer of the company.
If you are only porting one number, please send this page of the completed form to support@onsim.uk.
Moving Multiple Numbers?
If you are porting more than one number (for example, a range of numbers or secondary lines), you must also complete Page 2 of the form.
⚠️ Reminder: ONSIM covers the cost of your first single-line port submission. Porting additional numbers or resubmitting failed ports will incur a fee of £20 + VAT per number.
Section 5 - Additional number to port information
Section 6 - Signature
⚠️ Reminder: The person signing must be the named account holder or an authorised officer of the company.
Please send both pages of the completed form to support@onsim.uk
🚀 Final Checklist Before Sending
Legibility: If completing by hand, please use block capitals.
Match the Bill: Does the postcode and account number match your latest invoice exactly?
Active Status: Is the line still active with your current provider? (Do not cancel it yet!)
How to Submit:
One Number: Send Page 1 to support@onsim.uk.
Multiple Numbers: Send both Page 1 and Page 2 to support@onsim.uk.