Included within Sprint's grand plan to transition to a 4G LTE network in the near future is the practice of slowly shutting down the iDEN network that currently runs its Nextel services. Sprint has been transitioning its push-to-talk users to a CDMA-based system for the past year so that it can free up the spectrum that iDEN currently occupies (800MHz block). As a courtesy to the users still utilizing the iDEN network, Sprint has set up a website that has information as to when it plans to deactivate the iDEN towers. To start, Seattle and San Francisco will see tower reductions in April, followed by New York City in May, and Miami in June. Sprint notes that the iDEN service is not being totally shut down, but customers can expect to see reduced coverage areas. The carrier's CDMA network is unaffected by these tower reductions. Read the full story here.