PHILADELPHIA, Pennsylvania: Comcast is planning job cuts at its largest division, which runs its Xfinity broadband, mobile and pay-TV business, as part of a restructuring aimed at streamlining operations and boosting competitiveness, a source familiar with the matter said. Beginning in January, the company will eliminate a layer of management between corporate and regional offices, according to a memo sent to employees. The source said layoffs will follow, though Comcast is still deciding which roles will be consolidated at headquarters. Comcast also introduced national pricing to replace city-by-city rates and, in April, launched new broadband packages with five-year price locks to retain customers. The shake-up comes as Comcast grapples with subscriber losses in its core internet business and faces mounting competition from wireless carriers, including AT&T, T-Mobile, and Verizon.