[Q] Huge Increase in data usage!

I just change phones from the Galaxy S3 to a Note 3 on Verizon. Of course, they cancelled my unlimited data. They told me it shouldn't be a problem since my data history for 2 years has been between .8-1.4 gigs. Now that I've switched the first partial month was 4 GB and the second full month was nearly 6 GB. I have the phone set up the same as before and actually have not left the house/office nearly as much as usual due to recent changes in my business. Has anyone seen the insane increase in data usage and do you have any suggestions? Oddly, the main culprit seems the be my Email Exchange Server which is set to check every hour and is not set to push. I also have is set to only download attachments on WiFi. Internet searching on Chrome seems to use a ton also, considering how little I use it. I have notice at times that if the screen shuts off so does the WiFi. Any thoughts? Thank you!

Additionally, I have the stock android 4.4.2 update already installed and did not have that with my S3.

I wish I didn't have to give up the unlimited, but they made me get a new contact and there was no way to keep it.

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Oddly, it is almost entirely my exchange email. Even the Verizon people said, on the really bad day, that it would be difficult to send that much email in one day. Especially with the download attachments checked to only happen on WiFi.

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