In Q3 of 2017, Ofcom figures show that Vodafone customers complained the most about their pay-monthly mobile phone service. For every 100,000 customers, there were 10 complaints made to Ofcom. A stark difference when comparing to Tesco.
The mobile phone providers getting the most complaints
UK

Description
This chart shows the number of complaints received per 100,000 customers against UK mobile phone service providers in Q3 2017.










