C Spire said it’s modifying shared data plans...

C Spire said it’s modifying shared data plans to include a four-line version with unlimited voice and text and 10 GB of data for $160 per month. AT&T and Verizon Wireless began offering similar four-line plans for $160 per month earlier this year. C Spire also reduced the cost of smaller data allocations, with 1 GB costing $25 and 2 GB costing $40, $20 less in both cases than before. A new 3 GB level costs $60. All plans cost between $15 and $40 per line, depending on how much data are bought and whether the subscriber is paying for the smartphone on an installment plan, C Spire said in a news release Monday. The carrier also recently began offering an unlimited data plan for $65 per month, which is only available to customers not on a contract plan and who either paid in full for their device or are paying for it in installments (http://bit.ly/1fMKIKa).