Brand analysis
It’s been an impressive quarter for Three. The business has added +6 to its Overall Effort Score (among the largest increase we have seen across tables this wave) and has overtaken BT in sixth space.
With an Overall Effort Score of 55, Q3 2025 marks the brand’s highest score in two years of running the Customer Effort Index.
The brand’s component pillars reveals another strong set of results. Style of Communication is up by +4, Valuing the customer is up by +5 and Knowledge & Expertise and Speed of Resolving Problems are both up by +6.
It will continue to be a pivotal year for the Three brand as it formally joins with Vodafone. The CEI will continue to measure how easy Three is to do business with and will provide insights on how successful its customers feel the merger is for the service it provides.
 
             
             
             
                     
                                