From December 4 Three contracts will no longer be offered by the retailer
Three has terminated its relationship with Carphone Warehouse, the operator has confirmed.
From December 4, Three contracts will no longer be offered by the retailer, which has partnerships with all the major operators.
A similar move made by Vodafone in 2006 saw its customer numbers decline, forcing it to admit it made a mistake and return to Carphone Warehouse.
Three also exited Phones 4U stores in April 2012.