O2 Call Forwarding Code on OnePlus
O2 call forwarding uses standard GSM codes dialled from your OnePlus. This guide lists every O2 forwarding code, explains what each one does, and shows you how to set, check and cancel forwarding from your OnePlus.
- Forwarding codes reference
- How to set forwarding
- Common causes
- Frequently asked questions
O2 Call Forwarding Codes for OnePlus
Dial **21*[phone number]# and press Call. Replace [phone number] with the full UK number to forward to (e.g. **21*07911123456#). O2 will confirm when active.
Dial **61*[phone number]*11*30# and press Call. This forwards calls to voicemail or another number after 30 seconds of ringing on O2.
Dial **67*[phone number]*11*30# and press Call. Calls diverted when your OnePlus is engaged go to the forwarding number on O2.
Dial **62*[phone number]*11*30# and press Call. Activates forwarding when your OnePlus is switched off, in Airplane Mode, or out of O2 coverage.
Dial *#21# and press Call to check unconditional forwarding status. Dial *#61# to check conditional (unanswered) forwarding status on your O2 number.
Dial ##002# and press Call. This cancels all active call forwarding rules on your O2 number in a single command. Works from any OnePlus.
If GSM codes fail, ensure you have active O2 signal. Alternatively, use the O2 app or website to manage call forwarding settings — app-based forwarding does not require signal.
Common Causes of This Issue on O2
| Cause | Likelihood | Fix |
|---|---|---|
| No signal for USSD | High | Try in better signal area |
| Code format wrong | Medium | Use exact format: **21*[number]# |
| Account restriction | Low | Use carrier app instead |
Frequently Asked Questions
What is the O2 call forwarding code?
To forward all calls on O2, dial **21*[number]# and press Call. To cancel all forwarding, dial ##002#. To check forwarding status, dial *#21#. These are standard GSM codes that work on any OnePlus on O2.
How do I forward O2 calls to voicemail?
Dial **61*901*11*30# to forward unanswered calls to O2 voicemail. Dial **67*901*11*30# for busy calls. Dial **62*901*11*30# when your OnePlus is off or out of signal. All three together restore full voicemail functionality.
Why are O2 forwarding codes not working?
Forwarding codes require active O2 signal to process. If codes fail, try in an area with stronger signal. If the issue persists, contact 202 (free from O2) — some O2 account types restrict USSD code usage and require forwarding to be configured via the O2 app instead.
Still having trouble? Contact O2 support on 202 (free from O2) or visit our contact page for further help.