We've found that broadband customers who stay with their provider past their initial minimum contract are facing price hikes of up to £192 a year unless they renegotiate with their current provider or switch away to another firm.
In our latest survey, we've found that the customers with the biggest broadband providers are the least likely to be satisfied.
When we surveyed 2000 people about whether finding a new partner or switching broadband was trickier, we were surprised by some of the results
New Which? analysis of customer speed tests has found the areas of the country suffering from the slowest broadband - while many rural areas are affected, some cities come up short too.
We've found that customers with TV and broadband bundles from the big providers could be paying nearly £700 more than new customers are charged annually.
Our latest broadband satisfaction survey of more than 7,000 broadband customers found that price increases, slow speeds, connection dropouts and router problems were among the most common grievances across the 12 biggest broadband providers – but some are far worse than others.