Do you know why this is happening?
I've experienced this problem a day ago. Every time my phone sleeps and I need to unlock it, I'm having a hard time to find the right position on the screen and the exact pressure I need to give to swipe my finger on it.
I asked myself, what is the last thing I did on my phone before this problem exist? As I remember, I installed this kind of software. So, to fix it, I uninstalled that software. But the problem is still there.
The last option I made is to format my phone.
To format your Samsung Galaxy Pocket, go to your Settings
Check the box to Format USB storage
then tap Reset phone
tap the Factory data reset
then tap Erase everything
After that follow the next instructions you will encounter once your phone is already formatted.
Then your Samsung Galaxy Pocket screen will now back to it's normal function.
I guess, my phone got a virus from anywhere else that's why formatting it solves the problem.