Customization of Caller ID is offered w/ the Business Plans for SIP App (Business Plus, Business Ultimate). Due to telecommunication regulations, we are required to ensure accountability for the Call Rebranding service.

To activate the service, we will need the following documents for verification:

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, along with your Hoiio registered number. We will get back to you on your SMS rebranding application very shortly.

Other Notes

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 for.