Your SIM card number is printed on the card itself and also stored in your phone's settings

The SIM card number — technically called the ICCID (Integrated Circuit Card Identifier) — is a 19 or 20-digit code unique to your SIM card. You can find it two ways: by looking at the physical card, or by checking your phone's settings. The physical card is usually fastest. If you no longer have the card but need the number, your phone can retrieve it from the settings menu.

You might need this number when switching carriers, troubleshooting connection problems, or registering your device with a service provider. It is different from your phone number and your IMEI (the phone's own identifier), so make sure you have the right number before you contact support.

Key Takeaways

  • The SIM card number is printed on the physical card itself, usually on the back or front in small text.
  • If you cannot find the physical card, you can retrieve the number from your phone's settings without removing the SIM.
  • On Android, the SIM number appears under Settings > About Phone > SIM Status or Settings > System > About Phone.
  • On iPhone, the SIM number is in Settings > General > About under the ICCID field.
  • The SIM card number is different from your phone number and your phone's IMEI number.

Finding the number on the physical SIM card

The easiest way to find your SIM card number is to look at the card itself. Remove the SIM card from your phone — on most phones this means opening the SIM tray on the side with a small ejector tool (often included in the phone's box, or a straightened paperclip works). Once the card is out, look at the front and back for a long string of numbers printed directly on the plastic.

The SIM card number is usually labeled as ICCID or just printed without a label. It will be 19 or 20 digits long. Write it down or take a photo so you have it when you need it. If the numbers are faded or hard to read, try holding the card under a light or taking a photo with your phone's camera — the camera often picks up faded text better than your eye can.

Finding the number in Android settings

If you cannot locate the physical card or prefer not to remove it, Android phones store the SIM card number in the settings. Open Settings and look for a section called About Phone or Device Information. The exact path varies by manufacturer, but it is usually Settings > About Phone > SIM Status or Settings > System > About Phone.

Once you are in that section, scroll down until you see a field labeled ICCID or SIM Card Number. The full 19 or 20-digit number will be displayed there. Some phones also show this information under Settings > Network & Internet > SIM Manager or Settings > Connections > SIM Manager, depending on your Android version and phone brand. If you cannot find it in one location, try the other paths — Android manufacturers arrange these menus differently.

Finding the number in iPhone settings

On iPhone, the SIM card number is stored in the General settings. Open Settings, tap General, then tap About. Scroll down the list until you see a field labeled ICCID. The number displayed there is your SIM card number.

This method works on all recent iPhone models. If you are using an older iPhone or if the ICCID field does not appear, your phone may not support displaying this information in settings — in that case, removing the SIM card and reading the number directly from the plastic is your only option.

What to do if the number is not visible

If the printed number on your SIM card is too faded to read and your phone does not display the ICCID in settings, contact your mobile carrier directly. They can look up your SIM card number using your phone number or account information. Call the customer service number on your carrier's website or bill, or visit a physical store if one is nearby.

Have your phone number and account details ready when you contact them. The carrier can provide the SIM card number over the phone or in writing, and they can also confirm whether the number matches your current SIM card. This is a normal request and carriers handle it regularly.

SIM card number versus phone number versus IMEI

These three numbers are often confused because they all identify different parts of your mobile service. Your phone number is what people call or text — it is tied to your carrier account and can move to a new SIM card. Your SIM card number (ICCID) is unique to the physical card itself and changes when you get a new SIM. Your IMEI is your phone's own identifier, built into the hardware, and stays the same no matter which SIM card you use.

When a support agent asks for one of these numbers, make sure you provide the right one. If they ask for your SIM card number and you give your phone number instead, they will not be able to help you. The SIM card number is always the longest — 19 or 20 digits — while phone numbers are typically 10 digits in the United States.

Frequently Asked Questions

Can I find my SIM card number if I have already thrown away the card?

Yes. As long as the SIM is still in your phone, you can retrieve the number from your phone's settings using the steps above. Once you remove the SIM and no longer have the physical card, your phone cannot display the number anymore — at that point, only your carrier can look it up for you.

Is the SIM card number the same as my phone number?

No. Your phone number is what people use to reach you. Your SIM card number is a separate identifier for the card itself. They are completely different numbers, and you need the SIM card number specifically when a carrier or service asks for it.

What if my phone shows multiple SIM card numbers?

If your phone has two SIM slots (a dual-SIM phone), the settings will show both ICCID numbers — one for each card. Make sure you note which number belongs to which SIM if you need to reference a specific card later.

Do I need my SIM card number to switch carriers?

Not always. Most carriers use your phone number to identify your account during a switch. However, some carriers or specific situations may ask for the SIM card number, so it is useful to have it on hand. Your new carrier will tell you what information they need when you start the process.