I have a Verizon jetpack 4G LTE mobile hotspot MiFi 4510L and I recently purchased an iphone. Before I got my iphone, I NEVER got near my usage limit, but right after I got the iphone, I went over my minutes on the MiFi. I called Verizon, they told me I should have known better that my iphone would use up my time and made me pay the extra fees (about $150). Well, yesterday I accidentally turned the iphone onto wifi mode (I normally keep it on 3g so that I don't use the MiFi internet) and forgot about it all night. I woke up to a text from around midnight saying I was at 50% usage and another text from about 8AM saying I was at 75% usage. I hardly even get to 50% for the whole month, but somehow in 8 hours I went up 25%. I immediately realized the iphone WiFi was on and turned it off. I expected everything to be fine, but I just got another text from Verizon saying I was at 92% usage. That's been about 4 and a half hours from the 75% text.
What in the world is going on? I called Verizon, but their line was busy.
What could be going on? I'm not doing anything differently after I turn the iphone off, but it still went up 17% in 4 and a half hours?
HELP? I still have 2 and a half weeks on this cycle and I can't get another $150 (or more) bill!