So one of my users at work recently got a new iPhone 8+ to replace her older but still functional iPhone 6s+. She just turned it in and asked that I wipe the phone of all of her data.
He account has already been moved from the old phone to the new one via AT&T's online setup page.
It was purchased through our work account and you just enter the phone number for the account being transferred and the billing zip code and then you power cycle both phones.
When that is done the old phone displays "No Service" where the new phone shows AT&T. Essentially deactivating the SIM card in the old phone.
Here's where it gets strange...
I wiped the phone:
Settings > General > Reset > Erase all content and settings
And when I went back into the phone (going through the setup procedure to set up as a new phone) the phone icon shows the red indicator dot with a "4" in it indicating that there are 4 voicemails.
If I go into Phone > Voicemail the red "4" dot shows over the voicemail icon, bottom right, and all I can do is exit out of the phone.app or tap the "call voicemail" button in the middle of the screen, which just takes me to a gray screen that says "VOIOCEMAIL Call Failed" with the option to try again or cancel.
We use these phones as loaners when someone loses or breaks their iPhone until we can get them a new one, so I have to get this ready to to be rolled out to someone on a moments notice, which involves swapping in their old SIM (if available) and signing them into to their AppleID and mail accounts. But there seems to be no way to delete the old voicemails, still on the device.
Any ideas how I might approach that?