The Wall Street Journal will start asking those using the mobile version of its news to pay for the privilege, newspaper owner and News Corp. chief Rupert Murdoch warned today. Although the company currently offers its phone-optimized version for free, a new plan launching within "one to two months" will ask non-subscribers to any WSJ edition to pay $2 per week for mobile access. Those who pay for either the online or print editions will have the rate cut in half, and only those who subscribe to both will get the mobile format for free.