iPad mini VoIP on iPad Mini LTE

Sounds about right. Of course you can reset the statistics yourself and then make some calls to test it.

The faster the Internet, the more data Skype will use. So it will use more data per minute for calls on LTE compared to say 3G.

According to Skype, it's 3MB/minute for Skype-Skype calls (calls between users) and 1MB/minute between a Skype user and a landline/cell phone. This is because Skype-Skype is higher quality audio and therefore requires more bandwidth.

alphaod said:

The faster the Internet, the more data Skype will use. So it will use more data per minute for calls on LTE compared to say 3G.

According to Skype, it's 3MB/minute for Skype-Skype calls (calls between users) and 1MB/minute between a Skype user and a landline/cell phone.

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Even with just a voice call? That doesn't see right. Video, sure I can see that.

talkatone works great for me on my lte ipad mini and has setting on what quality (data usage) you want the calls to be.

I doubt it, but you'll want to test it yourself to see how much data you're using.

Line2 passes about 350k of data per minute when connected to a landline or cellular number over wifi or 3G, and around 700k per minute when connected to another Line2 client. That's 500 minutes of talk time for 175Mb to 300Mb of data, respectively.

http://support.line2.com/entries/21063208-how-much-data-does-line2-use

dinosaur1 said:

Talkatone and Skype have 1mb of data per minute it looks like.

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You can adjust the audio quality on talkatone to lower the data usage...