Released in May 2016. identified by model number SM-J120A.
Student-Contributed Wiki
An awesome team of students from our education program made this wiki.
This troubleshooting page will help you diagnose problems with the Samsung Galaxy Express 3
The phone will not power up or respond to power button.
Make sure that the charging cord is plugged into the phone and is allowing the phone to charge. If the phone does not charge, try using a different adapter or cord. If it is still usable, consider replacing the charging port.
Clean out the battery’s slot, including the battery connector, before re-inserting the battery. Make sure that the charging port is working and is plugged into a functional outlet.
The battery may have had some sort of malfunction. Try replacing the 2050 mAh lithium-ion battery. Samsung Galaxy Express 3 Battery Replacement
Screen does not respond to any touch inputs.
Sometimes the phone may have a hardware or software problem. First, try to restart the phone by holding down the power button and select ‘Restart’ from the pop-up menu.
If there are any visible cracks replace the screen and/or digitizer you may need to replace it. Samsung Galaxy Express 3 Screen Replacement
Use the scratch-resistant cloth or wipe to make sure the screen is dry and clean. Use only up and down strokes to maintain a clean consistent look. Make sure cloth is clean and rid of all dirt or dust.
The phone can be turned on but won’t show any software.
If the phone can turn on but won’t show anything on the screen, you may have a SIM card that isn’t working. Replacing the SIM card is an easy way to fix this issue. Try replacing the SIM card here: Samsung Galaxy Express 3 SIM Card Replacement
Use a different power outlet source. Sometimes the circuit may be turned off or have malfunctioned. Try using a power outlet in a different area.
Dirt, dust, and other debris may have accumulated in the charging port. Use compressed air to blow out anything that may be in the charging port. If compressed air won’t work use a pair of narrow tweezers to carefully grab any debris.
The audio during phone calls is distorted or non existent.
Sometimes there may be a software problem that causes the phone to not use the speakers. Restarting the device may solve the issue. Restart phone by holding down on the power button for three seconds and selecting ‘Restart’ from the pop-up menu.
If the front speaker is blown or broken, you may need to replace it.
The audio is distorted or non-existent when using an external audio device plugged into to an auxiliary jack.
The connection may be lost for the auxiliary cord. Try unplugging the auxiliary cord and plugging it in again. You may need to clean out dirt, dust or other debris stuck in jack using compressed air.
Another option may be using a different auxiliary cord.
Home button does not respond.
Sometimes the phone won’t receive the signal from the home button. One option may be to restart the phone to see if the phone picks the signal back up. Sometime there may be water damage or debris that is causing the home button not to work. Use compressed air to try and clean around the button or under it.
Replacing the home button may be another option. Samsung Galaxy Express 3 Home Button Replacement
Pictures appear to be blurry or obstructed.
The camera lens may be responsible for poor quality pictures. The settings may often be the issue. In settings, change the shutter speed to ‘normal’ or ‘fast’. Another resolution may be to turn down the ISO light sensor also in the settings. The last settings fix would be to increase the lens aperture in settings.
If the settings won’t help the issue or if the camera is clearly dirty or broken you may need to clean the camera lens with a scratch resist cloth or wipe.
If the lens is broken you would have to replace it. Samsung Galaxy Express 3 Rear Camera Lens Replacement
