The 'SIM network disabled' problem in Samsung Galaxy M15 and F15 might be due to the 'Battery Optimization' or 'Network Power Saving' mode in the software. When the phone is idle for 15-20 minutes, the system turns off the network signal to save batt...

This problem arises due to a flaw in Samsung's 'Background Blur' algorithm. When the background is completely white, the software's blur effect diffuses the white light so much that the icons and text completely blend into it. To fix this, you can go...