Complete Screen for Samsung M31

Samsung M31 screen with frame for the SM-M315F

The Galaxy M31 weighs 191 grams and has a 6000 mAh battery. When it falls, the impact can be significant, and sometimes the damage goes beyond the glass: the chassis may be slightly bent without it being obvious at first glance. Fitting a new panel onto a deformed frame is a common cause of cracks and pressure spots after a repair. That’s why this Samsung M31 screen comes already fitted to its frame.

This is a Premium-quality replacement part, measuring 6.4 inches, with a resolution of 1080 x 2340 and a maximum brightness of around 380 nits. In strong sunlight, leave automatic brightness switched on. You’ll also get a free screwdriver kit and a screen protector as a gift.

Check your model in Settings > About phone. This screen is compatible with the SM-M315F, including the /DS and /DSN variants. The M31s (SM-M317F) uses a different screen, so this one won’t fit.

Signs of a damaged Samsung M31 screen

M31 owners often report the same problem: the phone switches on in the morning, but there’s no way to enter the unlock pattern. Before ordering anything, press and hold volume down + power to force a restart, then try Safe Mode. If the problem persists, it points to a hardware fault. Note that this model stopped at Android 12, so don’t expect an update to fix it.

• Ghost touches: the phone opens things by itself because the damaged touch layer is sending false signals.
• Dead zones: drag an icon across the entire screen and you’ll see where it stops responding.
• Black or bluish spots that grow over time, often starting in a corner.
• Green or vertical lines. On Samsung panels, these are usually caused by a physical fault, and a factory reset won’t remove them.

How to replace the Samsung M31 screen with frame

Ignore guides that tell you to remove the broken glass with a heat gun. With this part, you transfer the phone’s components to the new frame, while the old screen stays in the old chassis. Set aside a couple of hours and a tray for organising the screws, as each one needs to go back in its original place. The iLevante team recommends following these steps:

1. Prepare the phone. Let the battery drop below 25%, switch the phone off and remove the SIM tray.
2. Open the back cover. It is made of plastic and held in place with clips. Insert a pick along the bottom edge and work your way around the sides. Lift it slowly: the fingerprint reader cable is very short and is attached on the inside. Disconnect it.
3. Disconnect the power. Remove the 7 screws from the motherboard cover, take the cover off and disconnect the battery connector before touching anything else.
4. Clear the lower section. Remove 8 more screws and take out the speaker. Disconnect the screen flex extension, the inter-board flex cables (always from the edge) and the coaxial cable. The sub-board is held in place with metal tape: warm the area gently and don’t lever underneath it.
5. Remove the motherboard. Take out the cameras, the final screw, the coaxial cable and the button connector. Lift the board without bending it.
6. Transfer the battery. It is glued in place. Apply gentle heat from the side of the old screen, using a heat pack kept below 65°C, and slowly loosen it with a plastic card. Bending or puncturing the battery can cause a fire. Secure it to the new frame with fresh double-sided tape.
7. Compare the two frames and transfer anything missing to the new one. Check the earpiece mesh too, as it is very delicate.
8. Test before closing. Refit the motherboard, reconnect everything and switch on the phone. Check the image, touchscreen, buttons, cameras and fingerprint reader. Then switch it off and close it up.

Common mistakes when fitting the M31 screen

Pulling on a flex cable that seems stuck is a classic mistake: it can damage the connector and cause intermittent image or touch issues. Use a pick and a plastic pry tool, never metal.

And don’t press down on the panel to make it fit. One click is enough for each connector. Thin screens can develop micro-cracks under pressure, which may turn into black spots a few days later.

Fit the free screen protector at the end, once you’ve tested the screen and cleaned off any dust.

Fingerprint reader and Samsung M31 screen

Here’s a useful detail that can save you trouble: the M31’s fingerprint reader is on the back cover, not under the glass. The new screen does not affect fingerprint recognition. If it stops working after the repair, first check the short cable mentioned in step 2, as it can come loose easily.

The technical specs of Samsung Galaxy M31

• Brand: Samsung
• Samsung Galaxy M31 Size: 159.2 x 75.1 x 8.9 mm.
• Release date: 2020, February 25. Released 2020, March 05.
• Weight: 191 g.
• Screen specs: Super AMOLED, 420 nits.
• Screen size: 6.4 inches, 100.5 cm2.