Key Takeaways
- Learn how to safely insert a nano-SIM or download an eSIM on Galaxy S25, S25+, and S25 Ultra.
- Understand the difference between single and dual SIM trays for different models.
- Set up SIM preferences and manage mobile networks using SIM manager in One UI 7.
Whether you’re using a physical SIM card or an eSIM, One UI 7 on the Galaxy S25 series makes it easy to get connected. Just follow these steps to insert your SIM properly or activate a mobile plan digitally.
Insert a SIM card
- Insert the ejection pin into the small hole on the SIM tray to release it.
- Pull the tray out gently from the slot.
- Place the nano-SIM card on the tray with the gold contacts facing upward.
- Gently press the SIM into place, then reinsert the tray into the phone.
Tip
- Make sure the tray is completely dry before inserting it into your device.
- Only use nano-SIM cards.
- Push the pin straight into the hole to avoid damaging the device.
- Ensure the SIM is securely in place or it may fall out when reinserting the tray.
Download and activate an eSIM
- Open Settings.
- Tap Connections > SIM manager > Add eSIM.
- Follow the on-screen instructions to activate a plan when detected.
If you have a QR code from your carrier
- Go to Settings > Connections > SIM manager > Add eSIM > Scan QR code.
- Scan the code to download the eSIM.
Manage SIM settings in One UI 7
Open Settings > Connections > SIM manager to access the following:
- SIM cards – Activate and customize settings for physical SIMs.
- eSIMs – Download new eSIMs or switch between existing ones.
- Preferred SIMs – Choose a default SIM for voice calls, messages, and mobile data.
- Data switching – Automatically use the secondary SIM for data if the primary network is unavailable.
- More SIM settings – Access additional network and SIM-related options.
Note: Using two active SIMs may slow down data speeds in some areas. Additional carrier charges may apply.
Frequently Asked Questions
1. Can I use both a physical SIM and an eSIM at the same time?
Yes, on dual SIM models you can use one nano-SIM and one eSIM, or even two eSIMs, depending on your carrier.
2. What should I do if my phone doesn’t recognize the SIM card?
Make sure the SIM is seated correctly in the tray. If the issue continues, restart the device or check with your carrier for SIM activation.
3. Is it safe to insert or remove the SIM while the phone is on?
It’s recommended to power off the phone before inserting or removing the SIM to avoid potential damage or network issues.
