Upgrade with the Share Everything plan?

I currently have an LG EnV Touch with internet access on it. I got it two years ago when the share everything plan hadn't started yet. Now that my contract is up and it is time for me to get a new phone, will my upgrade give me a "dumb phone" with internet or will I have to get a smart phone to continue to have internet access now that my family has the share everything plan? Also I was told that if i got the iPhone, it would be $50 a month? Is that true? Why or why not?

First, you can choose any phone you please, you don't have to get a "dumb phone" if you don't want one. And the iphone, it is true!

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