With $10 billion in cash, Dish Network now has accumulated the most money among all U.S. TV and phone providers, Bloomberg News reported on Wednesday. The cash pile has touched off increasing speculation that company Chairman Charlie Ergen may use it as part of an attempt to take over T-Mobile USA or merge with satellite rivalDirecTV. Being unable to bundle a telephone service together with a TV service has always been satellite TV's great disadvantage against cable, and it appeared that a takeover of T-Mobile would be the most likely course of action for Ergen. Ergen is clearly getting ready for something, Spencer Godfrey, a Montpelier, VT-based credit analyst at KDP Investment Advisors Inc., told Bloomberg in a phone interview. Having that cash opens a lot of options.