UK Customer Satisfaction Index July 2015. Major energy suppliers: BG, EDF Energy, E.ON, npower, Scottish Power and SSE.
We surveyed 2,443 people who had used our app in July, August and September 2015. 75% of respondents reviewed the experience as 'very easy'.
Tens of thousands includes customer transfers.
Calls to 0800 and 0808 numbers are free from BT landlines and UK mobile networks but other phone companies may charge for these calls.