IPhone 5 using way too much data?

I got my iPhone 5 in December and it uses so much data I've had to bump up my data plan to 10MB a month and yet still am nearly going over every month. I've read every post about this and every solution that is stated I've already done and it hasn't changed a thing. I use Wi-Fi every moment I can. I'm to the point where the only option is to shut it off completely, which I need to be able to get a hold of. Hopefully someone can at least tell me they're dealing with the same thing or tell me something I haven't already tried. BTW, it's a Verizon and it is not jailbroken.

Maybe you should consider changing to another carrier, have a look at the link, it should help you.

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