On the occurrence of Red Screen of death (RSOD) the system does not tolerate any modifications and it stops long-suffering any instructions from keyboard or mouse.
Every device needs to be updated on a regular basis in order to get the latest additional features. It also removes some of the minor issues related to your device. Most of the iPhone and other iOS users claimed that they face device stuck while updating issues. Here is how you can troubleshoot the issues found in your device during verifying updates. Source: http://enmcafee.com/