The Google Nexus 6 has walked through the doors of the FCC, and come out with an approval. The FCC has certified two models of the Nexus 6, their IDs being IHDT56QD2 and IHDT56QD1. These could be the XT1100 and XT1103 variants for different regions across the globe. From what we know, the XT1100 is the international variant, whereas the XT1103 is headed for North America.

Support for LTE bands 2, 4, 5, 7, 12, 13, 17, 25, 26, and 41 in the XT1103 model covers the LTE bands used by all major carriers in the US - Verizon, AT&T, T-Mobile and Sprint. The international XT1100 variant supports LTE bands 5 and 41 only, which would only work in South Korea and China.