Top of the Iphone there is a button
push and hold the button.
then there will be a red arrow and side to the right then the phone will turn off
to turn the phone on push the button and hold and intill you see a apple the let go
then white arrow and side it the phone the phone will turn on.
reboot start is push that top button and the home button a the bottom at the same time and hold.intill the white apple come on the screem.
then turn phone the phone on.
hope this help