I've been wanting to get a new phone for a little while now, and I've never bought an unlocked phone before, and my question is why cant use the Galaxy S9 Plus on my phone provider i.e verizon as amazon states here. https://www.amazon.com/gp/product/B079ZCJMYR/ref=ox_sc_act_title_1?smid=A35WDPB4Y8D904&psc=1