NEW YORK–(BUSINESS WIRE)–In response to Mint Mobile’s recent promotional campaign, Visible, a leading prepaid wireless provider on Verizon’s award-winning network and recently ranked #1 by J.D. Power for best purchase experience in its segment, is offering T-Mobile postpaid customers a 5-year rate guarantee at $15 per month, per line. Yesterday, Mint Mobile announced that if AT&T and Verizon customers switch to Mint Mobile, they can buy one three-month plan for $45 (not exactly the $15 a