Cant change Voicemail number

Anonymous · ‎20-01-2013

Hi, and thanks for reading this.

I got a Tesco locked Sony Xperia Miro for Christmas. I wanted to keep my O2 account so I paid £20 to Tesco for an unlock code. This worked fine. All except the Voicemail. Its still set at 905. Each time I change it I get a "VM number change unsuccessful" message. Having googled the problem I came across ##5005*86*901# to change it to o2. But then I get an "invalid MMI code" message. Has anyone know of a definitive fix for this?

Thanks in advance.

MI5 · ‎20-01-2013

MMI codes usually start "*#" not "##"

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

Anonymous · ‎20-01-2013

I don't really know this issue - but try **5005*86*901# ?

It seems more likely that it would begin with * and not # (just a guess).

Anonymous · ‎20-01-2013

I got the MMI codes here http://community.giffgaff.com/t5/Learn-giffgaff-Top-Tips/iPhone-codes/td-p/48140

I did try your suggestion *5005*86*901# but that too gave me an invalid MMI code message

MI5 · ‎20-01-2013

*# (asterix first)

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

Anonymous · ‎26-01-2013

No, *#5005*86*901# still gives the 'Connection problem or Invalid MMI code' message

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