Will I have a new phone number when switching to a new SIM card?

You can usually keep your phone number when you switch to a new SIM card. Your new carrier will guide you through the process, often referred to as "porting" your number.

Do I need a new SIM card if I upgrade my phone with the same carrier?

Not always. Your existing SIM card may be compatible with your new phone. Check with your carrier to confirm.

How do I activate an eSIM?

You'll need to find your IMEI or IMEI2 in your settings instead of popping open SIM trays and fiddling with physical SIM cards, but then the process is very similar to those above.

How to Activate a New SIM Card

3 min read

Updated February 06, 2024

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If you're trying to activate a new SIM card, you've come to the right place!

Having recently just gone through the entire process of activating the SIM cards on my kids' phones with two different low-cost carriers, I can guide you through the process.

Whether you're an iPhone or an Android device user, find my top recommendations below, and I'll also provide you with some additional insights about SIM cards and eSIMs.

Short Answer: Turn off your phone and pop open the SIM tray with a paperclip or ejector tool. Swap SIM cards and power your phone on. Follow your new carrier prompts, and you're all set.

How to activate a SIM card on an iPhone

1: Gather materials

Before you begin, make sure you have your new SIM card and your iPhone handy. You'll also need a paperclip or SIM ejector tool to open the SIM card tray on your cell phone.

2: Power off your iPhone

Turn off your iPhone to ensure that no data is being transmitted during the activation process.

3: Locate the iPhone SIM card tray

On most iPhones, the SIM tray is located on the device's side. Look for a small hole or slot.

4: Insert the SIM card

Insert the paperclip or SIM ejector tool into the hole or slot to open the tray. Carefully remove the old SIM card and replace it with the new one.

5: Power on your iPhone

Turn your iPhone back on. It should automatically detect the new card and prompt you with detailed steps to activate it. Follow the on-screen detailed instructions to connect to the mobile network. In your settings, you can then choose to lock your SIM to prevent unauthorized use.

How to activate a SIM card on an Android

1: Gather your materials

Just like with an iPhone, you'll need your new SIM card and your Android device. Make sure it's powered off before you begin.

2: Locate the SIM card slot

The location of the SIM card slot can vary depending on your Android phone. It's often found under the back cover, so you may need to remove it. Some newer device models have a SIM card tray on the side, similar to iPhones.

3: Insert the SIM card

Insert the SIM card into the slot or tray, ensuring it's placed correctly. Be gentle to avoid damaging the card or the device.

4: Power on your Android

Turn on your Android device. It should detect the new card and guide you through the activation process. Follow the on-screen detailed instructions to finish the setup and connect to the mobile network. Make a test call or text to ensure your device is connected to the carrier.

Activating different SIM card types

There are four primary types of SIM cards you might encounter:

Standard SIM: These are the largest SIM cards commonly used in older phones.
Micro SIM: Smaller than the standard SIM, micro SIMs were used in many smartphones before the nano SIM became the standard.
Nano SIM: The most common SIM card size today, used in the majority of modern smartphones.
eSIM: A digital SIM card embedded in your phone's hardware, eliminating the need for a physical SIM card.

What is an eSIM?

eSIM, short for embedded SIM, is a digital SIM card built into most newer smartphones and devices. So, chances are that if you have purchased a new phone or device in the last five years, it is likely eSIM-compatible.

Unlike a physical SIM card, you can switch carriers and plans without swapping out a physical card. You can activate your SIM digitally through your device settings, making it a convenient option for those who frequently change carriers or travel internationally.

Activating a new SIM card FAQs

Recap

Whether you have a new device or are switching a new SIM into an old phone, you should easily be able to follow the steps listed above to activate your new SIM in no time.

The process is straightforward for both iPhone and Android users. Just gather your materials, insert the new SIM card, and follow the on-screen instructions. Additionally, keep in mind the different SIM card types and the convenience of eSIMs for more flexibility in your prepaid plan choices.