Insert or remove SIM card on Galaxy S25

If you just got a Galaxy S25 and need to insert or remove a SIM card, this guide shows the exact safe process. The main goal is to avoid bending the tray, damaging the SIM contacts, or inserting the card in the wrong orientation.

What you need first

• A Nano SIM card (Galaxy S25 uses Nano SIM format).
• The SIM eject tool that came with your phone (or a proper SIM pin).
• A clean, flat surface with good lighting.

Before touching the SIM tray

1. Power off the phone (recommended before physical SIM handling).
2. Remove thick protective case if it blocks tray access.
3. Find the SIM tray on the bottom-left edge of the phone.
4. Locate the tiny eject hole beside the tray (do not press microphone holes).

How to insert a SIM card on Galaxy S25

1. Insert the SIM tool straight into the tray pinhole.
2. Press gently until the tray pops out slightly.
3. Pull the tray out fully with your fingers.
4. Place the Nano SIM in the tray cutout with:

• gold contacts facing up (screen-facing orientation)
• notched corner aligned with the tray notch

5. Make sure the SIM sits flat and secure in the tray.
6. Reinsert tray in the same orientation and push in slowly until flush.
7. Power on the phone and wait for network detection.

How to remove a SIM card

1. Power off the Galaxy S25.
2. Use SIM tool to eject the tray.
3. Lift the SIM card out of the tray carefully.
4. Reinsert empty tray fully so it sits flush.

How to confirm the SIM is working

1. Go to Settings > Connections > SIM manager.
2. Check that the physical SIM appears as active.
3. Confirm signal bars show in status bar.
4. Test by making a call or sending a text.
5. If needed, turn Airplane mode on/off once to refresh registration.

If SIM is not detected

• Recheck orientation (wrong notch alignment is common).
• Ensure tray is fully seated and flush with frame.
• Inspect SIM for damage or dirt on gold contacts.
• Try the SIM in another phone to rule out SIM failure.
• Contact carrier if SIM activation/provisioning is pending.

Common mistakes to avoid

• Forcing the tray in upside-down.
• Using a thick needle/paperclip that damages eject pinhole.
• Pressing near microphone hole instead of SIM tray hole.
• Hot-swapping repeatedly while troubleshooting network issues.

Once inserted correctly, your Galaxy S25 should detect the SIM within moments and connect to your carrier network normally.