IPhone 6 switch off with 40% battery
Hello,
I'm from France. My IPhone 6 switch off itself while it's still 30% to 40% battery. I can't switch on before plug in It. Then battery show it's not empty. It´s like this for ios9.
Could you have a solution for that ? Could you help me without to be obliged to get an appointment in applestore?
thanks
Rènald
iPhone 6, iOS 9