The map in this article shows when physical upgrades at the sites are scheduled to begin. This includes the upgraded antennas/panels, cabling runs, base station cabinets, etc. This work has been confirmed as under way.
However, as we have explained in our most recent Puerto Rico schedule article, LTE is still a few months out from deployment. The backhaul is not ready yet and neither is the new 4G core in Bayamon. LTE site work will not begin in PR/VI until the Fall.
Robert