An optical fiber cable. (credit: Srleffler)

Verizon has reportedly switched 1.1 million customers from copper to fiber lines over the past few years under a program it calls "Fiber Is the Only Fix." But some phone customers have refused the switch to fiber because they prefer to keep their copper lines—even though Verizon apparently is refusing to fix problems in the copper infrastructure.

The Philadelphia Inquirer reports that it obtained internal company documents that describe the effort to switch problematic copper lines to fiber. Verizon customers with copper-based landline phones who call for repairs twice in 18 months "will be told that their 'only fix' is to replace decades-old copper line with high-speed fiber as Verizon won't fix the copper," the report said.

While Verizon still has a few million copper-line customers, the Fiber Is the Only Fix policy is responsible for 1.1 million changes to fiber in Pennsylvania and other states. The policy is also in place in New York, Massachusetts, Virginia, and Delaware, and it's expected to expand to New Jersey, the report said.

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