By | September 11 2012 4:33 PM

Google Inc. (Nasdaq: GOOG) and Boingo Wireless Inc., (Nasdaq: WIFI) made another bold move Tuesday to position themselves as a prominent resource for wireless services by establishing another 4,000 mobile hotspots across the United States. As a promotional event to advertise the new expanded partnership with the companies are also making Wi-Fi free in all the new locations "through the end of September," Boingo said in a statement.