Although Apple tell us to switch applications without problems we can use the start button, it’s best to look after it.
I can change how applications without touching the start button?
the solution is offered by the same iPhone.
Go to Settings, then click General and look Accessibility.
Go to and activate AssistiveTouch. You are an icon appears on screen with 4 options:
1) Home, is what allows you to not have to click the button on the screen.
3) Devices, you can raise and lower volume, rotate, rotate and lock the screen.
4) Siri, communicate by voice to run programs and applications.
5) More, here the main thing is multitasking screenshot. This button allows you to close applications that let you open and consume battery. The screenshots are from the pictures.