A friend told me that you get better Internet access using a Mifi with a wifi only iPad than with a 3G iPad. She said this is because a Mifi accesses the Internet through wifi and not 3G and Wifi is better. However When I went to the store to buy a Mifi I was told that a Mifi accesses the Internet through 3G. So does a Mifi access the Internet in the same way that an iPad with 3 G does i.e. they both go through 3G? I'm new to all this and very confused so any emanation appreciated.