Bought my Jet Pack two weeks ago, had excessive data usage for no apparent reason and spoke with a Verizon rep who suggested getting it replaced. Did that a few days ago and used it for the first time tonight. Twenty minutes of email usage and the data usage was reported at 4.92 GB of data used. How is that possible? The last time it was like 6.7 GB of data in about forty minutes. No videos, no downloads, no chatting, no web browsin. What the heck is going on? I think I need to just give up on these units... Very frustrating