This guide details how to port a landline number to Onsim, if you would like to port a mobile number, please see our mobile porting guide.
In order to port a landline number you currently hold with another provider to Onsim, we need the following two documents:
1. Port form (attached at the bottom of this article). This needs to be printed on your company letter headed paper, fully completed, signed and dated.
It is imperative that the information submitted on the port forms are correct and are written clearly. We strongly recommend that you request the information needed to complete the form from your existing provider to ensure the information provided is correct.
We cover the cost of the first single line number port for you, however if the port fails due to the wrong information being submitted we reserve the right to pass on the charges for any subsequent port submissions to you.
2. A copy of your latest invoice from your current provider showing the address they hold for you.
Both of these then need to be emailed to our support team (email@example.com) so that we can complete our initial checks and begin the porting process.
The key points to remember when you are porting a number are:
- You need to have an active service with Onsim for us to be able to request the port.
We will provide you with a temporary number until the port is complete and once we receive the port authorisation form we can update the caller ID on your line so that all calls are made from the number you want to port.
- You also need to have an active service with the current provider of the number as if they disconnect this service you would lose the number and would be unable to proceed with the port.
If you would like calls to this number to come through to your Onsim SIM whilst the port is taking place, please ask the current provider of this number to forward all calls through to the temporary number we have given you.
How long will it take?
The process can vary depending on your current provider. On average, porting takes 5 to 10 working days once we have received the form and completed our initial checks, but exceptional circumstances may delay the process and we can not guarantee porting times due to the multitude of variables involved.
Will I be charged for the port?
We will cover the cost of the first single line port for new customers, however subsequent ports and multi line ports are chargeable. Please note that we do not cover any porting charges which you may incur from your old provider of this number.
If the port fails due to the wrong information being provided, we would need to pass on the charges for any failed ports to you.
If you choose to change your mind during the port process and not proceed with porting the number to us, we would need to pass on the port charges to you.
Details of the porting charges can be found here - Non Standard Charges
What if I have broadband on the number I would like to port?
If you have broadband on the number you wish to port over to Onsim, we will need this to be altered before we can proceed with the port.
To do this you need to email your current provider to ask them to renumber the broadband (so that the broadband is placed on another number), please ask them to ensure that the service on the number which is to be ported remains active and is NOT disconnected otherwise you would lose the service on the number you are wanting to port over.
Why do I need to pay for 2 services while the port is taking place?
You will need to pay for both your service with us and your service with your old provider while the port is taking place so it is essential that the information we receive is correct to prevent any unnecessary delays.
You need to have an active service with us as we are unable to port the number into our range without you having this and you need to have an active service with your old provider as the number has to have an active service linked to you to be able to port.
Can my old provider refuse to allow the port?
No, your old provider should not be able to prevent you from bringing your number with you. Number portability is regulated by Ofcom and if you need further information regarding this please contact us by emailing our support team (firstname.lastname@example.org)