Multi-choice problem: Continue writing the next sentence in this paragraph:

How to reset your samsung galaxy s4 
Press and hold the power button for at least ten seconds until the screen turns off. 
If your s4 has frozen while you are using it and none of the buttons are responding, you can try to force it to shut down. 
Power your phone back on as your normally would.

Select from the following. (i) Turn the phone over and remove the back by sliding it off. If your phone will not turn off, even after holding the power button, you'll need to remove the battery from the phone.. (ii) If you still aren't seeing an error message, try to back up your own phone to the power cord. Press and hold the power button three times using one finger at a time.. (iii) Press and hold the power button for at least thirty seconds. If your galaxy s4 hasn't frozen while you are using it and none of the buttons are responding, you can try to force it to shut down.. (iv) Power on your samsung galaxy s4 again if prompted. If the screen remains cold after pressing and holding the power button, it means that the device's battery is dead..
(i)