O2 Voicemail Not Working on OPPO
O2 voicemail works via a call divert. If it has stopped, the divert has likely been cleared. This guide explains how to restore O2 voicemail on your OPPO, set your PIN and access messages by calling 901.
- Restore voicemail divert
- Step-by-step fix
- Common causes
- Frequently asked questions
Restoring O2 Voicemail on OPPO
Call 901 from your O2 SIM. If the call connects and asks for a PIN, voicemail is working but the divert may need restoring. If the call fails, proceed to the next step.
Dial **61*901*11*30# from your OPPO phone dialler and press Call. This re-enables the voicemail divert for unanswered calls on O2.
Dial **67*901*11*30# (busy) and **62*901*11*30# (phone off/no signal). This restores voicemail when your OPPO is unavailable on O2.
If voicemail asks for a PIN you do not know, call 202 (free from O2) to reset it. O2 will verify your identity before resetting the voicemail PIN on your account.
The O2 app or Visual Voicemail feature on your OPPO may give direct access to messages without a PIN. Check your O2 app for a voicemail or messages tab.
If using codes, ensure the voicemail number is in full UK format. Some OPPO models require a + prefix: +44901 instead of 0 or just 901.
If voicemail has never worked or was recently lost after a plan change, call 202 (free from O2). O2 may need to re-provision the voicemail service on your account.
Common Causes of This Issue on O2
| Cause | Likelihood | Fix |
|---|---|---|
| Divert cleared | High | Re-enable with dial code |
| Wrong voicemail number | Medium | Use correct number for carrier |
| PIN locked | Medium | Reset PIN via support |
Frequently Asked Questions
What is the O2 voicemail number?
The O2 voicemail access number is 901. Dial this from your O2 SIM to check messages. If calling from abroad, dial the full international format: +44 followed by the number without the leading zero.
How do I set up voicemail on O2?
Dial 901 from your OPPO and follow the recorded prompts to set your PIN and record a personal greeting. If voicemail is not set up, callers will hear a default O2 greeting. You only need to do this once.
Why has O2 voicemail stopped working?
Voicemail on O2 works via a call divert. If the divert was cleared — by a network reset, SIM swap, or firmware update — voicemail calls will ring indefinitely instead of going to the mailbox. Re-enable using dial code **61*901*11*30# on your OPPO.
Still having trouble? Contact O2 support on 202 (free from O2) or visit our contact page for further help.