Dear Samsung Member,
Greetings from Samsung Customer Support!
Please be assured and to resolve "Overheating" issue please follow the below given steps:
1)Close background running apps.
2)Uninstall the unnecessary apps.
Overheating--Follow the link for more details :- https://www.samsung.com/in/support/mobile-devices/why-the-heating-issue-occurs-in-mobile-device/
Please be assured and to resolve "Battery drainage" issue kindly follow the given below steps:
1)Battery optimization:-Settings>Select Device Maintenance/Device Care>Optimize>Optimize all options like Battery, Storage and Memory
2) Close background running apps:-Tap on recent key and close the background running application.
For more information on battery drainage please click on the link below:
You may need to try clearing the app cache and data within your Settings to resolve "App crash" issue:
>>Launch your settings>apps>crashing app>storage>touch clear cache &clear data.
Please be assured and to resolve "Charging" issue kindly follow the given below steps:
1) Safe mode:-Power off the device > Press and hold the Power key for one or two seconds to turn on the device > When the Samsung logo appears, press and hold the Volume down key.
Note :-To exit safe mode restart the device .
2)Check charger functionality:-Request you to check the charger functionality with a different device or try to charge the same device with a different charger.
3)Reset the device: -Kindly create data backup of your device via SMART switch mobile application or http://www.samsung.com/in/support/smartswitch pc suite.
Tap on Settings>Tap on General Management>Tap on Reset.
If the issue still persist, kindly register your concern in Samsung Members app (Samsung Members app > Get help > Feedback > Error report/ask question).
Note: Please send device log files within 15 minutes of issue occurrence along with the exact issue details.
Thank you for writing to Samsung.
Samsung Customer Support