Sprint is planning to shut down the Nextel network as of June next year as the company wants to free up space for their next-generation LTE network. Sprint has been planning to shut down Nextel for a long time. ?Sprint will send written notices to business and government customers beginning June 1, 2012, regarding the iDEN Nextel National Network shutdown,? said Sprint said in a statement. ?Additional notices are planned for distribution to the iDEN base multiple times over the next year as the shutdown of the iDEN Nextel National Network becomes more imminent.?