According to a purported T-Mobile memo obtained by TmoNews, the nation’s No.4 carrier may be looking to increase the price of its premium 5GB and ultra 10GB unlimited data packages. The change could go into effect as early as April 4th and would add an additional $5 to the cost each plan. The 5GB plan will jump from $35 to $40 per month and the 10GB plan will increase from $65 to $70. T-Mobile’s Value Plan pricing will remain unchanged. The premium and ultra plan increases will only apply to customers who sign up for service after the effective date, however. The price increase comes as the carrier is looking to restructure and in doing so, will also cut 5% of its workforce and close seven call centers over the next three months. A second leaked T-Mobile image can be found after the break.