I have a1784 iphone 7 plus 128GB model CE for europe and i want to know if i can use with any USA carriers like Verion,Sprint,AT&T,T-MOBILE ?

Hello,

According to Apples website "Models A1778 and A1784 do not support CDMA networks, such as those used by Verizon and Sprint."

Here's the article it under "Cellular and Wireless":

https://www.apple.com/iphone-7/specs/

Hi

If your iPhone is SIMCARD free not tied to any network

Then it should work ok.

Cheers

Brian