U.S. carriers have started nailing down the release dates and prices of Samsung’s new flagship phone, the Galaxy S4.

AT&T Inc. has started taking pre-orders, and says phones will be shipped starting April 30. It’s charging $200 for the base model, with 16 gigabytes of memory, under a two-year contract. Staples Inc says it will start selling the AT&T model on April 26.

Sprint Nextel Corp. starts taking pre-orders on Thursday, and says in-store sales start April 27. It charges $250 for the base model.

T-Mobile USA starts taking pre-orders next Wednesday and in-store sales start May 1. — AP