When purchasing a phone, it's essential to check the screen for dead pixels or bright spots to see if there are any issues.
Here's how to check the screen of Samsung Galaxy J7 Plus:
Step 1: Download the Antutu app, open it, and select 'Screen test.'

Select 'Screen test'.
Step 2: Select 'LCD Test'.

Select 'LCD Test'.
Step 3: Tap multiple times on the screen to switch through different colors and check for any abnormalities.

Tap multiple times on the screen.
Step 4: Completion.

Completion.
That completes your setup process. Wishing you success.
