Cell phone users who still owe money to their carrier will be allowed to transfer their telephone numbers under the Federal Communications Commission’s (FCC) local number portability (LNP) rules. The FCC has set a Nov. 24 deadline for mobile carriers to implement the LNP system that allows users to switch carriers but still retain their cell phone numbers. Mobile carriers have been opposing the Nov. 24 deadline, claiming unclear rules and cost. Led by Verizon, the carriers filed a lawsuit that questioned the FCC’s authority to implement the LNP rules. In June, the court ruled in favor of the FCC.