Network Provider Voicemail Notification Stuck on iPhone

[Decoyaudio]

I had an issue recently after O2 upgraded my tariff where the “Network Provider Voicemail” notification appeared on my phone and couldn’t be cleared. After 6 support calls with both Apple and O2 I eventually found a solution myself so posting it here in case others find it useful.

In summary, you need to dial 901 and switch your notification method to SMS then switch it back again.

Step by step:

Dial 901

Press *
Press 5

Press 1

Hang up

Dial 901 again

Press *
Press 5

Press 3

Hang up

This worked for me, your mileage may vary ✌️

[Justin7]

This solution works for me

Thank you very much

[Cleoriff]

Pleased to hear it @Justin7 

All thanks to @Decoyaudio x

[MattB777]

Hi, so I tried the above and it’s sort of worked,

however when I go in to my visual voicemail on my iPhone it’s showing “ network provider voicemail” no

messages or anything?

[Enlli]

@MattB777 

Make sure O2 have you down for using idata and using a iPhone rather than standard data. Without this visual voicemail won't work 

[VL2]

Thank you so much! I had this exact problem (after updating my tariff) 

[paddymph]

You absolute hero Thankyou so much. It was driving me mad after upgrading my sim. This worked as of 05/12/25

thanks!