No Voicemail notification on Stright Talk after IOS update
I've recently lost the ability get my Voicemail from the Voicemail Tab on the iPhone. I can still hold and dial 1 which takes me to my Voicemail but as I no longer receive notifications when there are messages waiting, it's far from ideal. N.B There has never been support for Visual Voicemail on Straight Talk, but it would always provide notifications of messages as they were left; after clicking it would automatically dial the Voicemail tab.
I've tried resetting with the carrier (Straight Talk) several times and they concluded that it was an apple issue. I'm writing this from a Genius Bar where we just did a factory rest of the phone which did get my Voicemail working properly. However after updating, the problem returned. This doesn't seem to be an isolated or model specific issue either as my girlfriend has an iPhone 5 with the same issue. I've also seen other forums with other users having recent trouble with the same problem.
Cheers,
M
iPhone 6, iOS 8.4