(May 10, 2019, 10:07 AM EDT) -- BALTIMORE — With the filing of a May 2 putative class complaint against T-Mobile US Inc. in Maryland federal court, four major cellular carriers have been hit with lawsuits for allegedly selling their customers’ geolocation data to third-party data aggregators (Shawnay Ray, et al. v. T-Mobile US Inc., No. 1:19-cv-01299, D. Md.)....