T-Mobile USA has now become the first GSM network operator to add an Internet Plan with unlimited GPRS transfer to its array of rate plans. Available both as an add-on plan and a standalone plan, T-Mobile offers existing subscribers the option to add unlimited GPRS to their current plan for a monthly fee of $19.99 USD. New customers, and subscribers who prefer switching to the new Internet Rate Plan, will be charged with a monthly fee of $29.99 USD.">