We have very a very limited data plan on the More Everything plan. If I turn cellular data off, then I do not receive Visual Voicemail nor do I receive any alert that I have a new voicemail. The only way to know is to check my missed calls to see if someone called, then call in to my voicemail to see if I have a new message. This is a huge inconvenience! I do not want to leave cellular data on all the time because I usually have wifi available for when I need data. Connected to wifi, I also don't receive visual voicemail nor any voicemail alerts. I appears that voicemail alerts and visual voicemail only work if cellular data is turned on? If this is true, what other functions of the iPhone only work when cellular data is on? I want to minimize cellular data usage and only use it when absolutely necessary. I thought I could use wifi for all my data needs and only use cellular as a back-up. I have iOS 8.3.
A couple questions:
1. Is there a way to receive voicemail alerts without turning on cellular data? (I don't care about visual voicemail)
2. If I do leave cellular data on all the time, does visual voicemail use my data plan? If yes, how much data does a typical 30 second voicemail use?
Thanks for your help!