Hi. I just received a largish update and i usually like to go into recovery mode and clear system cache afterwards.
Usually it is a case of turning off the phone. Then holding volume up and power together. I usually keep hold of both buttons until i see the Android.
However, now, whether i hold both buttons in or let go of the power button and still hold volume up when the Samsung logo comes up or let go of both when the logo comes up, all methods just continue to restart the phone.????