Verizon Wireless intends to increase the price of its grandfathered unlimited mobile data plan by $20 per month to a total of $49.99. The change affects only 1% of Verizon customers, who've held onto these unlimited plans for some time. Verizon doesn't offer unlimited plans to new customers any more, who instead need to purchase mobile data in buckets. Any customer who has an unlimited plan under contract will be able to keep the current pricing until the contract terms are fulfilled; however, the majority of people with unlimited data plans are off contract. The $49.99 includes unlimited data, but not voice/messaging services; those cost extra. 

source: PhoneScoop