Call divert guide · O2

How to divert calls on an O2 mobile

The short answer

On an O2 mobile, the simplest way to divert calls is your phone's own call forwarding settings: choose when unanswered, when busy and when unreachable, and enter the number to forward to. We haven't found an O2 consumer help page that we can cite for divert codes or charges, so check with O2 what forwarded calls cost on your plan.

Diverting to an AI voice assistant? BrightRay’s answers 24/7, takes the caller’s details and emails you the transcript and recording. Talk to ours: ring 0141 461 4870. Add an AI voice assistant · AI voicemail for missed calls

On an iPhone

Open Settings, then Phone (on newer iOS, Settings > Apps > Phone).
Tap Call Forwarding and switch it on.
Tap Forward To and type the number we give you.
Go back to save it. A phone icon with an arrow at the top of the screen shows forwarding is on.
To stop, switch Call Forwarding off again.

On Android

Open the Phone app, tap the three-dot menu, then Settings.
Tap Calls (on some phones: Supplementary services or Calling accounts), then Call forwarding.
Choose when to forward: when busy, when unanswered or when unreachable. Always forward sends every call.
Enter the number we give you and tap Turn on.
To stop, go back to the same screen and turn each option off.

What it costs

Check with O2 how forwarded calls are charged on your plan. O2 Business publishes charges for diverts on its business landlines, covered in our landline guide.

Worth knowing

On an iPhone, the Call Forwarding switch sends every call, so your phone will not ring. For "only when I don't answer" forwarding, use your network's codes if it publishes them, or ask your network to set it up.

Source

O2 Business: analogue call diverts (business landlines)

O2's published divert instructions we could cite cover O2 Business landlines, not mobiles, so this guide sticks to your phone's own settings.

Checked October 2026. Networks change their menus and prices, so if a code doesn’t work, check the source above or ask your network.

Other networks

All call divert guides · How the AI receptionist works · AI voicemail for business · Website + AI voice assistant

O2 divert questions

Asked and answered.

Can I divert my O2 number to an AI receptionist?+

Yes. Divert to the number we set up for your receptionist, ideally only when you don't answer, when you're busy and when your phone is off, so you still take the calls you can. Check with your network how forwarded calls are charged.

Does diverting calls cost anything on O2?+

Check with O2 how forwarded calls are charged on your plan. O2 Business publishes charges for diverts on its business landlines, covered in our landline guide.

How do I check the divert is working?+

Ring your number from another phone and let it ring out. You should hear your AI receptionist answer, and get the email with the caller's details a moment after you hang up.