Set up cellular during initial iPhone setup

When you power on a new iPhone for the first time, you'll see a series of setup screens. One of these screens asks about your cellular connection. If you have a physical SIM card from your carrier, insert it into the SIM tray on the side of your phone before you start setup — this is the easiest route and lets the phone detect your carrier automatically.

If you're using an eSIM instead (a digital SIM stored on your phone), the setup process will prompt you to scan a QR code or contact your carrier to transfer your number. Your carrier will send you instructions for this, usually by email or text. Follow those instructions during setup, and your cellular service will activate once the transfer completes.

If you skip the cellular setup screens during initial setup, you can add it later — but doing it now saves you a step. The phone will guide you through each screen in order, so you won't miss anything if you pay attention.

Key Takeaways

  • Insert your physical SIM card into the tray on the side of your iPhone before powering it on for the first time, or have your eSIM QR code ready.
  • During setup, the phone will detect your carrier and ask you to confirm your cellular plan — follow the on-screen prompts to activate service.
  • If you use an eSIM, your carrier sends activation instructions by email or text; follow those instructions exactly as written.
  • You can add cellular service after setup is complete if you skip it during initial setup, but it's faster to do it now.
  • If your carrier is not recognized during setup, go to Settings > Cellular > Cellular Plans to add it manually.

Insert your SIM card before setup begins

Your iPhone has a small tray on the side that holds your SIM card. On most iPhones, this tray is on the right side of the phone; on some older models, it's on the left. Look for a tiny hole next to the tray.

Apple includes a SIM ejector tool in the box with your phone — it's a small metal pin. Push this pin straight into the hole next to the SIM tray, and the tray will pop out. Place your SIM card into the tray with the gold contacts facing down, then slide the tray back in until it clicks. Do this before you power on the phone for the first time, so setup can detect your carrier right away.

If you don't have a physical SIM card, skip this step and move to the eSIM section below.

Activate an eSIM during setup

An eSIM is a digital SIM that lives inside your phone instead of on a physical card. If your carrier supports eSIM, they will send you a QR code by email or text message. Keep this code handy before you start setup.

When the setup screen asks about cellular, choose the option to set up an eSIM. The phone will ask you to scan the QR code your carrier sent. Use the camera to scan it, and the phone will contact your carrier to activate service. This usually takes a few minutes. Once activation is complete, your phone number and plan will be active on your new iPhone.

Some carriers let you transfer an eSIM from an old phone to a new one instead of using a QR code. If this applies to you, your carrier's instructions will tell you which option to choose during setup.

Add cellular service after setup if you skipped it

If you didn't set up cellular during initial setup, you can add it afterward. Go to Settings on your home screen, then tap Cellular. If you have a physical SIM card, tap Add Cellular Plan and follow the on-screen steps. If you have an eSIM QR code, tap Add eSIM and scan the code.

The phone will contact your carrier and activate service within a few minutes. You may need to restart your iPhone once activation is complete — the phone will tell you if this is necessary.

Troubleshoot if your carrier isn't recognized

Sometimes the iPhone doesn't recognize your carrier during setup, especially if you're using a smaller regional carrier or a carrier that's new to your area. If this happens, the setup screen will show "Carrier not found" or a similar message.

Go to Settings > Cellular > Cellular Plans and look for your carrier's name in the list. Tap it and follow the prompts to add it manually. If your carrier still doesn't appear, contact your carrier's customer service — they can send you a different activation method or walk you through the process over the phone.

In rare cases, your carrier may require you to activate service on their website or through their app before the iPhone can detect it. Your carrier's setup instructions will mention this if it applies to you.

Check that cellular is working

Once setup is complete, look at the top left corner of your screen. You should see signal bars and your carrier's name. If you see signal bars and the carrier name, cellular is active and working.

If you see "No Service" or no carrier name, wait a few minutes — the phone sometimes takes time to connect to the network after activation. If it still shows no service after 10 minutes, restart your iPhone by holding the power button until the "slide to power off" screen appears, then slide to turn it off. Wait 30 seconds, then hold the power button again to turn it back on.

If you still see no service after a restart, contact your carrier. They can check whether your account is active and whether your phone number is properly connected to your device.

Understand dual SIM if your iPhone supports it

Some newer iPhones support two cellular plans at the same time — one physical SIM and one eSIM, or two eSIMs depending on your model. If your phone supports this, you can set up both during initial setup or add the second one later through Settings > Cellular > Add Cellular Plan.

When you have two plans active, you can choose which one to use for calls, texts, and data. Go to Settings > Cellular to switch between them, or set one as your default for each type of communication. This is useful if you have a work phone number and a personal number, or if you travel and want to use a local carrier's plan in another country.

If you're not sure whether your iPhone supports dual SIM, check the tech specs on Apple's website for your specific model.

Frequently Asked Questions

Do I need to insert my SIM card before I power on the phone?

No, but it's faster if you do. If you insert it before setup, the phone detects your carrier automatically during the setup screens. If you insert it after setup, you'll need to go into Settings and add it manually, which takes an extra few minutes.

What if I lost my SIM ejector tool?

A small paperclip, safety pin, or the tip of a ballpoint pen will work in place of the SIM ejector tool. Push it gently into the hole next to the SIM tray until the tray pops out. Don't force it — if it doesn't pop out easily, you may be pushing in the wrong spot.

Can I use my old SIM card in my new iPhone?

Yes, if your old phone and new iPhone use the same SIM card size. Most modern iPhones use the same nano-SIM size, so your old card will work. Just insert it into the new phone and set it up. Your carrier may need to update their records to recognize the new phone, but this usually happens automatically.

How long does eSIM activation take?

Usually between 5 and 15 minutes after you scan the QR code. During this time, the phone is contacting your carrier's servers to transfer your number and plan. If activation takes longer than 30 minutes, restart your iPhone and try again, or contact your carrier.

What does "Carrier not found" mean?

It means the iPhone doesn't recognize your carrier's network during setup. This happens with some smaller or regional carriers. Go to Settings > Cellular > Cellular Plans and look for your carrier in the list to add it manually. If it's not there, contact your carrier for an alternate activation method.