Solved! Go to Solution.
Hi chi0, @userGGCC6ora9W, and @userMVyYFguiSy, welcome to the Community, and thank you for letting us know about this. If you cannot adjust the sound on your device using the Volume keys, or turn off/wake your device with the Side key, you need to first identify whether it is a software or a hardware issue. Follow the guide below to troubleshoot the malfunctioning keys issue. This guide, in addition to inspecting the affected button for dust, debris, or damage, can help with steps to get to the root of the problem: https://www.samsung.com/sg/support/mobile-devices/what-to-do-when-the-keys-on-your-galaxy-device-sto...
If the diagnostics shows it needs attention, the phone will need to be evaluated by a certified technician. You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location or by contacting customer support at 1-800-726-7864.
For service outside of the U.S., please use this link: https://www.samsung.com/us/common/visitlocationsite.html