Carrier IQ's software has raised concerns among privacy advocates in the past. Those concerns boiled over to multiple class action lawsuits against the company four years ago, along with several handset makers, which are still being partially litigated.
The aforementioned wiretapping charge was eventually dismissed, though allegations that Carrier IQ violated numerous state laws are still being argued.
Nielsen, which as been working with Carrier IQ for the past several years, is also said to be involved in the deal. The two firms have been collaborating to measure the performance of mobile networks and devices.
Out of the four major wireless carriers in the U.S., only Verizon said it's never used Carrier IQ's software. Sprint used it only briefly but quickly dropped it following the negative publicity. AT&T and T-Mobile are thought to be the last two still making use of the company's software.