So far, the carrier has upgraded 164 cell sites in the San Juan metro region, 128 cell sites in the north and east regions, and 174 cell sites in the central, south and west regions.
A reading above the threshold level suggests an expansion in the manufacturing sector with respect to the previous month, according to the PMI data.
The undisclosed investment by the Texas firm will also enable Rock Solid to add 100 new jobs in Puerto Rico to its 134-person roster in the next five years.