I need my voicemail now . For some reason I am unable to setup a t-mobile voicemail because ATT is the current voicemail. I switched 8 months ago to T-mobile
iPhone 12 Pro Max, iOS 15
Likely during the Number Port Process (Transfer your Tel# from old carrier to new carrier) the New Carrier didn't bridge your voicemail properly, or the old carrier has some sort of Vice Grip on your Tel#.
It's more likely fixable by contacting your current carrier's technical support line, and getting a ticket open. Especially if your plan / carrier is supposed to include VoiceMail in your monthly rates. Might even bring up asking them for some compensation for it being non-functional since you ported your number if they were responsible for it to function after your Port Completed.
Likely during the Number Port Process (Transfer your Tel# from old carrier to new carrier) the New Carrier didn't bridge your voicemail properly, or the old carrier has some sort of Vice Grip on your Tel#.
It's more likely fixable by contacting your current carrier's technical support line, and getting a ticket open. Especially if your plan / carrier is supposed to include VoiceMail in your monthly rates. Might even bring up asking them for some compensation for it being non-functional since you ported your number if they were responsible for it to function after your Port Completed.
ask your telecom provider, apple makes the phone, not the phone service.
See if this helps w/ your setup:
Check your voicemail on iPhone – Apple Support (AU)
Although I suspect the solution has already been proffered.
Why does my voicemail still use ATT when I have switched to T-mobile
