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"It's been stated that it is a penta-band HSPA radio. Indeed there will be a HSPA+ and an LTE version as those are different technologies.
Penta-band refers to the 5 frequencies supported by the HSPA radio (850/900/1700/1900/2100).
LTE is a different beast entirely requiring a separate radio for LTE (except in the new LTE incarnations that AT&T; is using that allows for a single radio - this is not present on the Galaxy Nexus models thus far though).
There will be an LTE version and an HSPA+ version. It does not currently appear that there will be an LTE version for GSM carriers - only CDMA. We'll see if that changes when everything flushes out.
What is different is that there need not be several GSM/HSPA versions supporting the varying frequencies - there can be one that operates anywhere on HSPA/UMTS (as opposed to one "world" version on 900/1700/2100 and one "AT&T;/Canada" version on 850/1900/2100)."