After removing the back panel of the Galaxy A15, you will need to remove all 15 screws. To replace the display, you will first need to remove the flex cable that connects the display to the motherboard, the flex cable from the daughter card. warm up the screen and replace it with a new one.
The manufacturer provides a “patch” to remove the battery. Therefore, you can remove and replace the battery without any problems.
Overall, the expert gave the Samsung Galaxy A15 8.5 out of 10 points for ease of maintenance. These include: 1.5 out of 2 points for component location and repair time, 2 out of 2 points for ease of finding the necessary parts inside the smartphone, 1.5 out of 2 for ease of screen replacement, 1.5 out of 2 points for ease of battery replacement, 2 out of 2 points for ease of replacing other components of the device.
Source: Ferra

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