Verizon Wireless has announced details of its tiered pricing structure, which goes into effect July 7. Speaking with FierceWireless, Verizon spokesperson Brenda Raney said that customers will now be able to choose from four monthly data plan options—$10 for 75MB, $30 for 2GB, $50 for 5GB, or $80 for 10GB—with overage charges of $10 per GB. Raney also said that existing customers will be able to keep their unlimited data plans, including…