Overview

This guide explains how to register your new Giant phone number (mobile or landline/VoIP) with WhatsApp Business.
Verification works slightly differently depending on the type of number you’ve ordered, so follow the steps below that match your number type.

Before You Begin

You will need:

• Your new Giant number

• The WhatsApp Business app

• The ability to receive a verification code via:

  • SMS → if you ordered a mobile number, or

  • Automated voice call → if your number is a landline/VoIP number

Step 1 — Install WhatsApp Business

1. Open the App Store (iPhone) or Google Play Store (Android).

2. Search for WhatsApp Business.

3. Download and open the app.

Step 2 — Enter Your Giant Number

1. Select United Kingdom (+44).

2. Enter your Giant number without the leading zero.

   • Example: 0203 123 4567 → +44 203 123 4567

Step 3 — Verification

If You Have a Mobile Number

• You will receive a 6-digit SMS code.

• Enter the code in the app.

• If SMS does not arrive, you can select “Call me” instead.

If You Have a Landline / VoIP Number

• SMS will not arrive — this is normal.

• Tap “Call me”.

• You will receive an automated voice call reading your verification code.

• Enter the 6-digit code into WhatsApp.

Tip: Make sure your phone system can receive automated calls.
If you use IVR, call screening, or call blocking, ensure automated calls are allowed.

Step 4 — Set Up Your Business Profile

After verification, you will be asked to set up your business details:

• Business name

• Category

• Opening hours

• Website

• Description

These details help customers recognise your business.

Step 5 — Start Using WhatsApp Business

Once completed, your Giant number is fully registered.
You can now:

• Chat with customers

• Set up welcome/away messages

• Use labels to organise chats

• Add products/services in the catalogue

• Create quick replies for common messages

Troubleshooting

I didn’t get the SMS (mobile number)

• Ensure the number is entered in +44 format

• Wait 1 minute and tap Resend SMS

• Try “Call me” instead

I didn’t get the verification call (landline/VoIP number)

• Make sure your line can accept inbound calls

• Check if call filtering or IVR might be blocking automated calls

• Try again after 1 minute

WhatsApp says the number is already in use

This can happen if the number was previously registered.
You can still continue — WhatsApp will simply log out any other device using the number.

Need Help?

If you need assistance setting up WhatsApp Business with your Giant number, contact our support team and we’ll be happy to help.