NTT DoCoMo Inc. has agreed to start selling Apple Inc.'s latest iPhones in an effort to halt the erosion of its market share by its smaller rivals.

The two new models for DoCoMo's network — a cheaper version in bright colors and an updated high-end device — will go on sale Sept. 20, the nation's largest mobile carrier said in a statement.

Apple unveiled the 5C and top-of-the-line 5S iPhones at an event at its Cupertino, California, headquarters Tuesday.