The largest study ever conducted on the matter found that cellphone use does not increase the risk of cancer. The study compared the rate of brain tumors in over 350,000 people in the country of Denmark. There was no significant difference in cancer risks between those who use a cellphone and those who don’t. In other news, Sprint cancelled unlimited data plans for all devices other than mobile phones. This applies to mobile hotspots, tablets and netbooks with 3G or 4G data connectivity. All data use over 5GB will cost five cents more per megabyte. And finally, Google is working on its own music-download store that will have integration with the social network Google+. Similarly to iTunes and Amazon, users can download MP3s for around 99 cents. Unlike those services, Google hasn’t secured deals with all four major record labels.