Dixons Carphone and Sprint will end their stores joint venture and focus their collaboration on the deployment of the Honeybee platform.
Dixons Carphone's connected world services division and Sprint entered into an agreement in July 2015 to open and manage a number of Sprint-branded stores in the US and provide certain consultancy services to Sprint.
In March 2016 they entered into a further agreement to deploy Honeybee into the Sprint retail estate.
A statement today said: "In light of the changing US mobile market landscape and Sprint's review of its own distribution strategy, the companies have reached mutual agreement that CWS will focus on the deployment of the Honeybee platform across the entire Sprint estate and that Sprint will acquire the CWS 50% share of the distribution joint venture."
Dixons Carphone deputy group chief executive Andrew Harrison said: "We have enjoyed working with Sprint to accelerate their store opening programme over the last two years and have developed an estate and a pipeline to help support their ambitious growth plans.
"With the significant shift in the US mobile market, now is the right time to transfer these stores to Sprint, and to concentrate on our exciting software business, Honeybee.
"It has been a privilege to work so closely with Marcelo and his excellent team as they turn around this amazing business and we look forward to making Honeybee as successful for Sprint as it is for us."
At 9:07am: (LON:DC.) Dixons Carphone share price was -10.65p at 306.55p