VerizonWireless.com and Walmart.com sell Verizon 4G SIM cards. The SIM card is available in an activation kit that requires the purchaser to bring his own device and offers a no-contract monthly phone plan that includes unlimited talk and text.
Once purchased, the user installs the SIM card in a SIM-enabled Verizon device and then activates it. Besides unlimited talk and text, the SIM card kit that Wal-Mart sells offers 500 megabytes of data after activating the plan, but the data must be used within 90 days. Verizon offers the same SIM card kit but with 1 gigabyte of data that must be used within 90 days.