Problems changing default voicemail number... Says invalid number everytime

[AstronautAbort]

Hello i have a Moto G and whenever i recieve a voicemail it defaults to calling 905 and says it's an invalid number. How do i change so it defaults to 901?

I'm on o2

Thanks.

[jonsie]

Try >> phone then open call settings. Scroll to voicemail, voicemail settings, voicemail number.

[AstronautAbort]

Thanks for your reply.

I went into the settings like you said and went to change it from 905 to 901 and it displays a message saying "Couldn't change the voicemail number"

Any ideas?

[jonsie]

Is this a Tesco locked mobile?

If so, short of rooting it I'm not sure you can change the number.

[MI5]

If it's preset into the firmware you'll just have to dial 901 manually to get VM although I'm not aware that Tesco have their own firmware....

[jonsie]

A similar problem on the giffgaff community with a possible messy fix mentioned with regards to an app in google play.

Not sure it's worth the hassle tbh. Just so easy to dial 901 manually.

http://community.giffgaff.com/t5/Help-Support/unlocked-Tesco-Moto-G-can-t-change-voicemail-number/td...

http://community.giffgaff.com/t5/Tips-Advice/HOW-TO-Huawei-Ascend-G300-voicemail-without-rooting-or-...

[AstronautAbort]

It was unlocked from the Tesco Mobile network.

You're probably right, i may just leave it and dial 901 manually like you say, but this could be worth a shot if it's not too much hassle

[MI5 · Accepted solution]

http://community.giffgaff.com/t5/Tips-Advice/HOW-TO-Huawei-Ascend-G300-voicemail-without-rooting-or-...
It's on this thread but involves VoIP calling protocols....