We appreciate you taking the time to reach out to us, Thu. We always look forward to hearing from our valued customers. We noticed you reached out concerning your Galaxy Tab A9+. Your Galaxy device’s touchscreen is its center of navigation, so we understand how concerning it can be when the touch function isn’t working properly. However, there are some simple ways to get the touchscreen working again when it’s unresponsive. Certain factors may affect how well the touchscreen on your device performs. Please keep the following in mind when using the touchscreen: If a third-party screen protector or accessory is attached, the touchscreen may not work properly. In particular, it may not work well if there is dust or air under the protector if two or more protective films are attached to the screen, or if the protective film is peeling near the edge of the screen. Remove the screen protector or film if it is peeling or has debris underneath it. If you are keeping the screen protector or film, you can enable the touch sensitivity option to help with taps and touches. Open Settings, then tap Display, and then tap the switch next to Touch Sensitivity. Also, keeping your device’s software updated regularly will ensure it continues to run smoothly. You can also check for updates for any third-party apps you are using. If this does not help, please reach out to us at Samsung Support so that we can further assist you. -Kelvin
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