If you're still clinging to your Verizon unlimited cell phone plan, your monthly bill is about to jump by $20.<br />Verizon is planning to raise the price of unlimited data plans from $29.99 to $49.99 per month.<br />The company confirmed the move to CNNMoney on Thursday morning.<br />It's yet another sign the company's trying to force people to let go of their highly-prized plans that remain only because they were grandfathered in.<br />The unlimited data is only part of a cell phone bill.<br />Talking and texting are extra.<br />Verizon customers will see the increase starting on monthly bills that arrive on Nov. 15 or later.