Press and hold the power button on the right side of the phone
To turn on your Samsung Galaxy A15 5G, locate the power button on the right edge of the device. Press and hold it for about three seconds until you see the Samsung logo appear on the screen. The phone will then boot up and display the lock screen.
If the phone has been off for a while or the battery is completely drained, it may take up to 10 seconds for the logo to appear. Keep holding the button until you see movement on the screen — do not release it early, or the phone will not start. The power button sits roughly in the middle of the right edge, making it straightforward to find by feel alone.
Key Takeaways
- The power button is located on the right side of the Galaxy A15 5G, roughly in the middle of the edge.
- Press and hold the power button for three to ten seconds until the Samsung logo appears on the screen.
- If the battery is completely dead, plug the phone into a charger and wait a few minutes before attempting to power on.
- Once the phone boots up, you will see the lock screen and may need to enter your PIN, pattern, or biometric information to access it.
- A force restart using the power button and volume down button together can revive a phone that does not respond to the power button alone.
What to do if the phone does not respond
If you hold the power button and nothing happens, the battery may be completely empty. Connect the phone to a charger using the USB-C cable that came with it, and wait at least 15 minutes before trying again. A completely drained battery sometimes needs time to accumulate enough charge before the phone will respond to the power button.
If the phone still does not turn on after charging for 30 minutes, try a force restart. Press and hold the power button and the volume down button together for about 10 seconds. This forces the phone to restart even if the software is frozen, and it works even when the normal power button does not seem to respond. You may see a menu appear on screen during this process — if so, continue holding both buttons until the phone restarts.
Understanding the startup sequence
After you release the power button, the Samsung logo will appear first, followed by the Galaxy A15 5G boot animation. The entire startup process usually takes 30 to 60 seconds. During this time, the phone is loading its operating system and preparing all its features to run.
Once the lock screen appears, the phone is ready to use. You will need to unlock it by entering your PIN, drawing your pattern, or using your fingerprint or face recognition if you have set those up. If you have not set a lock method, the phone will go straight to the home screen without any additional steps.
Charging before first use
If this is a brand-new Galaxy A15 5G, charge it for at least 30 minutes before powering it on for the first time. New phones ship with a partial charge, but starting with a fuller battery helps the initial setup process run smoothly and prevents the phone from shutting down mid-setup.
Use the USB-C charger and cable included in the box. The Galaxy A15 5G supports fast charging, so it will reach a usable charge level quickly — usually 20 to 30 percent in 15 minutes. Once you have charged it, follow the power-on steps above to begin the initial setup process.
What happens after the phone powers on
On first startup, the phone will walk you through setup steps including language selection, Wi-Fi connection, and Google account sign-in. You can skip any step and complete it later, though signing into your Google account early makes it easier to restore your apps and data from a previous phone or backup.
If the phone has been used before and you are straightforward turning it back on, it will go directly to the lock screen. Unlock it and you will return to wherever you left off — your apps, messages, and settings will all be exactly as you left them. No data is lost when you power off and back on.
Distinguishing the power button from other buttons
The Galaxy A15 5G has three buttons on the right edge: the power button in the middle, and the volume up and volume down buttons above and below it. The power button is slightly larger and has a different texture than the volume buttons, making it straightforward to identify by touch. Only the power button turns the phone on; the volume buttons control speaker volume during calls and media playback.
If you accidentally press a volume button instead of the power button, nothing will happen to the phone's power state. You can press the volume buttons as many times as you want without affecting whether the phone is on or off. This design prevents accidental power-offs when you are adjusting volume.
Frequently Asked Questions
How long does it take for the Galaxy A15 5G to fully power on?
The Samsung logo appears within three to ten seconds of holding the power button. The full boot sequence, including all startup animations, takes 30 to 60 seconds total. Once the lock screen appears, the phone is ready to use when ready.
What if I accidentally press the power button and the phone turns off?
straightforward press and hold the power button again for three seconds to turn it back on. The phone will go through the same startup sequence and return to the lock screen. There is no harm in turning the phone on and off repeatedly.
Can I power on the Galaxy A15 5G while it is charging?
Yes. You can power on the phone at any time, whether it is plugged in or not. If the battery is very low, charging it while it powers on may slow the startup process slightly, but it will still work normally and complete the boot sequence.
What is the difference between the power button and the volume buttons?
The power button is on the right edge, usually in the middle. The volume buttons are also on the right edge but are positioned above or below the power button. Press only the power button to turn the phone on; the volume buttons control speaker volume and are not used for powering on.