Whether you're using a phone, tablet, smartwatch, or earbuds, all Galaxy devices have a set temperature range, where they operate at their best. While they may feel warm under certain conditions, like charging, this does not affect the device's lifespan or performance. However, if your devices get too warm, it could cause some issues. Give this link a try: https://www.samsung.com/us/support/answer/ANS00076952/
If your phone is getting too warm to touch, repairs would be recommended in order to have the technicians evaluate the device. This would be covered under the warranty. You may look into walk-in service repair options at your local uBreakiFix: https://www.ubreakifix.com/locations
Samsung also offers ship-in repair options. To look into ship-in options, you can private message us here with the full model code and IMEI number: http://bit.ly/2XERsky
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.
Please note, notification emails are a DO NOT REPLY address, you must log-in on the community page in order to respond.