I rooted my device (galaxt tab4 t230NU) and I just upgraded android 4.2 to 5 with Custom ROM. I want to disable factory reset option from Custom ROM. any Idea how it is possible?
Factory reset is performed in Recovery Mode: it can be done directly in recovery GUI or by selecting an option in Setting app that create command file in Cache partition and reboots to Recovery to read this file. So, in order in disable factory reset, I suggest wiping your device Recovery partition.