Chances are, Google already fulfills a lot of your technology needs, but soon, they could be providing you mobile phone service too. The tech company has announced a plan for a phone network in the U.S. Instead of building a brand new network, “Project Fi” will use data and signals from T-Mobile and Sprint, switching users to whichever 4G signal is stronger. It will also automatically connect to free Wi-Fi hotspots and allow users to make regular voice calls over Wi-Fi. For now, Project Fi will only be available to Nexus 6 smartphone users. It will cost $20 per month plus $10 for every additional gigabyte of data used, but customers will only be billed for data used, instead of paying for a set monthly data amount. It remains to be seen if the network will be successful, but experts say that if Google can work out the kinks, their service could pressure wireless providers to lower prices and adapt better to different devices …