Buying a phone in the US as a European

So i'm currently living in Europe, and will be staying in the US for a little while (approx. 7 months). I am considering buying a new phone in the US, as prices are way lower than in my country. However, I have no idea about any of the consequences that would have.Will I for example have problems using a European sim card when I get back to Europe?Any advice on whether this is a good or bad idea is welcome. via /r/tech https://ift.tt/35JrUGJ