AT&T said it would offer a cheaper mobile...

AT&T said it would offer a cheaper mobile data plan aimed at families with multiple smartphones or other mobile devices. AT&T said Saturday its new “Mobile Share Value” plans would cost less than its standard shared data plans when it includes at least a 10 GB-per-month bucket of shared mobile data. A value plan at the 10 GB tier would cost from $130 per month to cover two smartphones, with each additional device on the plan costing an extra $15. A 50 GB plan would cost $405 per month for two devices (http://soc.att.com/LDrrwQ). It’s unclear how the other three top U.S. wireless carriers will react to AT&T’s plans, which are “still at a premium to Sprint and T-Mobile US, but a clear discount to Verizon,” said Wells Fargo analyst Jennifer Fritzsche in a note to investors. AT&T added a net 566,000 postpaid wireless subscribers during Q4, ending the quarter with a net $6.9 billion profit on $33.2 billion in revenue.