I have a lead on a nicely priced iPhone 6. The original owner was using it on US Cellular and decided to switch providers. So I have a simple questions...can a "US Cellular iPhone 6" be used on Verizon? Is there anything I should be aware of when trying to get a phone from one network working on another? I've bought used phones before but never "cross network". But they're both CDMA so I would *think* it shouldn't be too complicated??