Caller ID customization is useful when you are still considering if number porting is for you and you want to try out the SIP trunk service, with this service, you can force the outbound calls to display any telephone number owned by you.

Customization of Caller ID is available on all Hoiio’s SIP trunks plans.

Due to Singapore telecommunication regulations, we are required to ensure accountability for the Call Rebranding service. To activate the service, send us ( the following documents:

For individuals:

  • ID (front & back), or passport (particulars page)
  • Recent phone bill (within 3 months – first page, with visible billing address)

For companies:

  • Registered ACRA number or a copy of your Letter of Business Registration
  • Approval letter from the Board of Directors. The approval letter should state that the company’s Board of Directors, approves the use of Call Rebranding, ensures the company adheres to regulations presiding over its use and takes responsibility for any issues arising from the misuse of the rebranding service.
  • Recent phone bill (within 3 months – first page, with visible billing address) to prove that the replacing number belongs to the company.

These documents should be sent to our support team, along with your registered number. We will get back to you on your SMS rebranding application very shortly.

  • Caller ID customization is currently only available to Singapore registered users.
  • Caller ID customization is not guaranteed to work for recipients in other countries although you may still be able to attempt to customize the Caller ID.
  • Lastly, Caller ID customization will only apply for the specific subscription requested.

Please contact for this service.