As a matter of fact, it is preferable to take advantage of a technical program to assist you while having some problems that you do not know why. In this way, not only can the problem be overcome but also avoid further issues caused by improper solutions. So here, to work out the iPhone screen dimmed matter, what the most expedient measure is to make use of Joyoshare UltFix iOS System Recovery. The biggest standout feature of such an intelligent repair tool is that it can easily have assorted iOS issues resolved without damaging any data on your iDevice.
Naturally, it does more than that. More narrowly, it carries a free function with which you are able to make your iPhone enter/exit recovery mode at any time you want. In addition, the built-in standard mode and advanced mode make it more flexible to repair issues. That standard mode is designed to troubleshoot usual iOS problems like iPhone screen dimming, iPhone black screen, iPhone screen won't rotate, and so on. As far as advanced mode, it could serve you while coming across serious issues. The steps to operate it are as follows.
Key Features of Joyoshare UltFix iOS System Recovery:
Repair more than 30 sorts of iOS problems
Compatible with almost iOS devices and iOS 13
Can do the same on iPhone/iPad/iPod and Apple TVs
Get iPhone screen keeps dimming solved without losing data