I was getting super excited for this phone and then I read the PC Magazine article and found this:
"The OnePlus X may also have a critical problem for U.S. buyers. It has LTE bands 1/2/4/5/7/8. It's missing 12 and 17. That means while it's compatible with AT&T and T-Mobile, it's missing the low-frequency, 700MHz bands (Bands 12 and 17) that have the best suburban, rural, and in-building coverage. This means the OnePlus X will have significantly worse LTE coverage on AT&T and T-Mobile than competing phones."
"The OnePlus X may also have a critical problem for U.S. buyers. It has LTE bands 1/2/4/5/7/8. It's missing 12 and 17. That means while it's compatible with AT&T and T-Mobile, it's missing the low-frequency, 700MHz bands (Bands 12 and 17) that have the best suburban, rural, and in-building coverage. This means the OnePlus X will have significantly worse LTE coverage on AT&T and T-Mobile than competing phones."