The UK has fallen from third place to fifth in Huawei's Global Connectivity Index, which compares the availability and quality of broadband and related technologies across nations.
A relative lack of cable infrastructure and ongoing mobile broadband issues in rural areas meant the UK was unable to defend the podium spot it achieved in 2014.
Huawei said that although the UK is a leading country in ICT, there are still areas for improvement.
"The UK should adopt greater cloud services and improve the public governance," the company stated.
"[It] should also invest more in projects that interconnect rural areas and encourage ICT partners to broaden their horizon by providing affordable rates for broadband services for all income levels just like the United States."
The US took first place in the latest Global Connectivity Index, with a score of 85, ahead of Sweden (82), Singapore (81) and Switzerland (78) - which achieved the same index score as the UK.
Germany was the biggest loser in the latest set of results. Having topped the 2014 chart, it fell to 11th place in the index with a score of 71.