Top 20 Most Common Questions About eSIM (Answered)

eSIM has become one of the most important mobile features for users in Singapore. It is built into the latest smartphones, tablets and wearables, and allows you to activate mobile service without a physical SIM card. If you have searched questions like what is eSIM, how does eSIM work or how to transfer eSIM to another phone, this guide puts all the essential answers in one place.

Below are the 20 most common questions that Singapore users ask about eSIM and how it works.

What is eSIM?

eSIM stands for embedded SIM. It is a digital SIM that is built into your device. Instead of inserting a physical card, you activate your mobile service through a QR code or app.

How Does eSIM Work?

An eSIM works by storing your mobile profile digitally inside your device. Your telco sends you an activation QR code or installation instructions. Once installed, the eSIM functions the same way as a normal SIM.

How to Use eSIM?

You use eSIM by activating a mobile plan on your device through a QR code, app or manual activation steps provided by your telco. Once set up, you can call, text and use data normally.

How to Transfer eSIM to Another Phone?

Most telcos require you to delete the eSIM from your old device first. You then request a new QR code or profile and install it on your new phone. Some brands like Apple allow direct eSIM transfer during phone-to-phone migration.

How to Activate eSIM?

You activate eSIM by scanning the QR code provided by your telco or by following the installation steps inside your phone settings. Activation usually completes within minutes.

What is an eSIM Card?

An eSIM card is not a physical card. It is the digital version of a SIM stored inside your device. The term is sometimes used to refer to the activation QR code.

How to Transfer eSIM?

The transfer process involves removing your eSIM profile from the old device and installing a fresh profile on the new one. Each activation QR code can usually be used once, so a new one is required.

How to Install eSIM?

Install your eSIM by scanning your telco’s QR code under Settings, then Mobile Network. Your device will download your mobile plan profile and connect to the network automatically.

Does eSIM Have a Number?

Yes. Your eSIM has the same mobile number as a physical SIM. Once activated, it is tied to your mobile plan and behaves like a regular phone number.

How to Change eSIM to Another Phone?

You delete the eSIM from your old device and install a new eSIM profile on your new phone. For some phones, you can move the eSIM during data transfer setup.

How to Transfer eSIM to a New Phone?

You follow your telco’s eSIM transfer steps. Most telcos allow re-issuing a new QR code so you can activate the eSIM on your new phone safely.

How to Activate eSIM on Android?

On Android, open Settings, then Connections or Network. Choose SIM Manager or eSIM and scan your activation QR code. Follow on-screen instructions to complete setup.

How to Buy eSIM in Singapore?

You can buy an eSIM directly from telco websites, mobile apps or retail stores. Many providers also support instant online activation.

How to Convert Physical SIM to eSIM?

Go to your telco’s app or portal and request a SIM replacement or SIM swap. Choose eSIM as your option. You will receive a QR code to activate your new digital SIM.

Where to Buy eSIM in Singapore?

eSIMs are available from major telcos. Many plans can be purchased online with immediate activation through a QR code or app.

Is My Phone eSIM Compatible?

Most new phones from Apple, Samsung, Google, Xiaomi and Oppo support eSIM. You can check compatibility under your device settings or through your telco’s compatibility list.

How Long Does eSIM Take to Activate?

Most eSIM activations complete in under five minutes. In some cases, it may take slightly longer if network registration is required.

How to Delete eSIM?

On your phone, go to SIM Manager or Mobile Network settings. Select the eSIM profile and tap Remove or Delete. Removing the profile disconnects the plan from your device.

How to Check eSIM Data Usage?

You can check data usage inside your phone’s mobile settings or inside your telco’s app. eSIM data usage appears the same way as a physical SIM.

How to Purchase eSIM Online?

You can purchase an eSIM plan online through your telco’s website. After payment, the eSIM QR code is delivered instantly by email or inside your app account for activation.