By Marina Lopes WASHINGTON (Reuters) – Verizon Communication Incs high speed wireless customers who subscribe to the companys legacy unlimited data plans might experience slower speeds starting Oct. 1, the company said on Friday. Verizon will slow services for the top 5 percent of data users who are on unlimited plans in places where the network is experiencing high demand, the company announced on its website. The policy is currently in effect for unlimited subscribers on the 3G network, but will be expanded to its 4G, higher speed network in October. Verizon stopped offering unlimited data plans in 2012.