Anyone correct me if I am wrong, you can activate either the 16 or 32 Nexus 5 on Sprint. So my thought is that both sizes of the Nexus 6 will also work on Sprint. The way I understand it is that each Nexus 5 and 6 is not locked to a particular carrier, but can be used on anyone of them. Note, i believe Verizon passed on the Nexus 5.