Aloha Barbie, thanks for taking the time to ask us your question about the Samsung Galaxy A35 5G. Whether you're using a phone, tablet, smart watch, 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. Although your Galaxy devices may get warm sometimes, they have built-in safeguards to alert you and protect themselves if their temperature exceeds the normal operating range. Feel free to check out, "Keep your Galaxy device at its normal operating temperature" if you would like to learn more. Feel free to reach out to Support afterward if you have any questions or if you would like any further assistance. Thank you for being a valued Samsung customer. - Debra