Switching from a physical SIM to an eSIM does not change your number or carrier. Your carrier reissues your existing subscription as an eSIM profile; you download it to your device, and the physical card is deactivated. The conversion takes under fifteen minutes in most cases. The main prerequisites are that your device supports eSIM and that your carrier offers an eSIM reissue for existing subscribers.
For background on what eSIM is and how it differs from a physical SIM, read What Is an eSIM? and Physical SIM vs eSIM before continuing. For setting up eSIM via QR code on iPhone, see How to Set Up eSIM on iPhone via QR Code.
Before You Start: Data Backup and Compatibility Check
Back up your device before making any carrier-level change — use iCloud Backup (iPhone) or Google One / local backup (Android). Switching SIM type does not affect device storage, but a backup provides a recovery point if something goes wrong.
Also confirm your account is in good standing. Some carriers temporarily block eSIM issuance for accounts with a past-due balance or a recent SIM swap.
Check the Prerequisites
Before contacting your carrier, confirm three things.
1. Your Device Supports eSIM
Not every device has eUICC hardware. eSIM on iPhone begins with iPhone XS, XS Max, and XR (2018). On Android, Google Pixel 3 and later generally support eSIM; Samsung Galaxy S20 and later, and flagship devices from other manufacturers, also include eSIM on most variants. Budget Android phones released before 2022 often lack eUICC hardware entirely.
To check quickly on iPhone: go to Settings > Cellular. If you see Add eSIM or Set Up Cellular, your device supports eSIM.
For a full device compatibility reference, see eSIM-Compatible Devices.
2. Your Device Is Carrier-Unlocked
A carrier-locked device can only use eSIM profiles from the carrier it is locked to. If you are converting your SIM with your current carrier, this is not an issue — your locked phone can still accept an eSIM from the same carrier. If you plan to switch carriers as part of or after this conversion, unlock your device first.
On iPhone: Settings > General > About > Carrier Lock. If it reads No SIM restrictions, the device is unlocked.
3. Your Carrier Offers eSIM Reissue for Existing Subscribers
eSIM reissue for existing customers (as opposed to new activations) requires the carrier to have deployed SM-DP+ provisioning infrastructure for this purpose. Most major carriers in North America, Europe, Japan, South Korea, and Australia support it. Confirm the option is available on your carrier’s website or app before proceeding.
Online Conversion Method
Most carriers allow existing subscribers to request an eSIM reissue through their website or app without visiting a store. The exact steps vary by carrier, but the general flow is consistent.
Step 1 — Log in to your carrier’s website or app
Open your carrier’s official app or website and sign in to your account.
Step 2 — Find the SIM management section
Look for a section labeled SIM Management, Manage SIM, Switch to eSIM, or eSIM Conversion. This is often under account settings or device settings.
Step 3 — Verify your identity
Carriers require identity verification before issuing a new eSIM. This step varies by carrier and may include:
- Confirming your account PIN or password
- Entering a verification code sent by SMS to your current number
- Completing an ID check via a third-party identity verification service (uploading a government-issued ID and a selfie)
The purpose is to prevent unauthorized SIM swaps.
Step 4 — Receive your eSIM profile
After identity verification, the carrier generates an eSIM profile. You receive it as:
- A QR code displayed on screen or sent by email, or
- An activation link that redirects you to your device’s eSIM setup, or
- A notification to open the carrier app on your device, which initiates the download automatically
Step 5 — Download the eSIM profile to your device
Follow the instructions for your device:
- iPhone (QR code method): Go to Settings > Cellular > Add eSIM > Use QR Code and scan the code. Full instructions: How to Set Up eSIM on iPhone via QR Code.
- Android (QR code method): Go to Settings > Network & Internet > SIMs > Add eSIM and scan the code. Full instructions: How to Set Up eSIM on Android via QR Code.
- Carrier app: Follow the in-app prompts. The app communicates directly with the carrier’s SM-DP+ server and handles the download automatically.
Step 6 — Confirm the switch
Once the profile is downloaded, your carrier deactivates the physical SIM and activates the eSIM profile on your number. This transition typically takes a few minutes. Keep your physical SIM in the device until the eSIM is confirmed active.
In-Store Conversion Method
If your carrier does not offer online eSIM reissue, or if you prefer in-person assistance, visit a carrier store or authorized retailer.
Bring the following:
- Your device (with the physical SIM installed)
- Government-issued photo ID — the same ID you used when you opened the account, or current government ID if the account was opened long ago
- Your account credentials or PIN — in most cases you will need to verify ownership of the account
A store representative will initiate the eSIM reissue from the carrier’s backend system, then guide you through the profile download on your device. The physical SIM is deactivated when the eSIM becomes active. The process takes approximately ten to thirty minutes at the store, depending on queue and system response time.
Some carriers charge a conversion or SIM swap fee when the conversion is done in-store but process it at no charge online. Check your carrier’s fee schedule in advance.
The “Convert to eSIM” Option on iPhone
On iPhone, iOS offers a built-in shortcut for converting a physical SIM to eSIM on supported carriers — without initiating the process through the carrier’s website or app first.
To access it: Settings > Cellular > Convert to eSIM
This option appears only if:
- Your iPhone model supports eSIM (iPhone XS or later), and
- Your installed physical SIM is from a carrier that has enabled this conversion path with Apple
When you tap Convert to eSIM, your iPhone communicates with the carrier’s systems directly to initiate the reissue. You may still be required to complete identity verification steps on your device as part of the flow. After the carrier approves the conversion, the eSIM profile downloads automatically and the physical SIM is deactivated.
If Convert to eSIM does not appear in Settings, use the standard online or in-store method described above.
What Happens to the Physical SIM Card
Once the eSIM profile is active and your carrier confirms the transition, the physical SIM is deactivated by the carrier’s system. It can no longer connect to any network.
You can safely discard the physical SIM card. The card itself holds only the IMSI and Ki credentials needed to authenticate to the carrier’s network; the deactivation voids those credentials on the carrier’s end. No personal data such as contacts or messages is stored on modern SIM cards in a way that would pose a risk after deactivation.
If your device has a physical SIM slot, leaving the deactivated card in the slot after conversion causes no harm. However, removing it prevents potential confusion — for example, if you later factory-reset the device and iOS or Android prompts you to set up the SIM found in the slot.
Brief Service Downtime During the Conversion
Expect a short period — typically a few minutes — when your phone has no mobile service. This occurs because the carrier must deactivate the physical SIM profile on their system before the eSIM profile becomes active. The timing gap between these two steps is brief but unavoidable.
To minimize disruption:
- Complete the conversion when you do not need mobile connectivity urgently.
- Download the eSIM profile onto your device before the physical SIM is deactivated, if your carrier’s flow allows this sequence.
- If you need to make calls during the transition, use Wi-Fi calling or a messaging app over Wi-Fi.
If your service does not restore within fifteen minutes after the eSIM profile is marked as active, restart your device. If service is still absent, contact your carrier — the eSIM profile may not have been activated on the carrier’s backend.
Dual SIM Configuration After Conversion
If your device has a physical SIM slot that remains empty after the conversion, you can add a second eSIM or, on devices that support it, insert a physical SIM from another carrier. This creates a dual-SIM configuration.
After installing the eSIM profile, configure how each line is used from Settings > Cellular (iPhone) or Settings > SIMs (Android):
| Setting | What to configure |
|---|---|
| Default voice line | Which line is used for outgoing calls |
| Default SMS / iMessage line | Which line sends text messages |
| Mobile data line | Which line handles data traffic |
For a complete explanation of dual SIM options on iPhone, see How to Set Up eSIM on iPhone via QR Code.
If the Conversion Fails
The QR code does not work
eSIM QR codes are single-use. If you scanned the code but the download failed (for example, due to a dropped Wi-Fi connection), the code may be invalidated. Contact your carrier and request a new QR code.
If your carrier provides an SM-DP+ address (also called an activation code or LPA string) instead of or in addition to a QR code, you can enter it manually. On iPhone, go to Settings > Cellular > Add eSIM > Enter Details Manually and type in the SM-DP+ address and activation code. On Android, look for Add eSIM > Enter activation code manually in your SIM settings. Manual entry produces the same result as scanning the QR code.
The eSIM is installed but the physical SIM is still active
Some carriers’ systems take a few minutes to complete the deactivation on their backend. Wait up to fifteen minutes, then restart your device. If the physical SIM is still active and the eSIM is not, call your carrier to confirm the backend activation was completed.
”Unable to Add Cellular Plan” error on iPhone
This error typically means one of the following: the QR code has already been used or expired, your iPhone is carrier-locked to a different carrier, or your account has not yet been cleared for eSIM issuance on the carrier’s system. Confirm each with your carrier before requesting a new code.
Carrier says your device is not eSIM-eligible
Some carriers maintain device eligibility lists that restrict eSIM issuance to specific models. If your device is listed as incompatible but you believe it supports eSIM, escalate to carrier support with your device model and IMEI. Carriers update eligibility lists periodically.
Reissue Fees
Carrier policies on fees for converting a physical SIM to eSIM vary. Some carriers process the conversion at no additional charge regardless of channel; others charge a SIM reissue or conversion fee, particularly for in-store conversions. A small number of carriers charge a fee for any SIM type change. Check your carrier’s current fee schedule on their website or in their app before initiating the conversion — the FAQ entry at the top of this guide covers the general landscape.
Keep Your eSIM Details Until Activation Is Confirmed
Save or screenshot your eSIM QR code, SM-DP+ address, or any carrier-issued activation details before beginning the installation. Retain them until the eSIM profile is visible in your device’s SIM settings and you have confirmed mobile service on that line. Some failures are silent — the profile appears to install but is not active on the carrier’s backend — and having the original details lets you retry without contacting carrier support again.
When to Remove the Physical SIM Card
Leave the physical SIM in the tray until the eSIM profile is downloaded, your number is on the eSIM line, and the carrier has confirmed the physical SIM is deactivated. Once those conditions are met, remove it if you want the slot for a second SIM, or leave it — a deactivated card causes no interference. Do not remove it during the conversion itself, as some carrier flows require the physical SIM present in the device to verify account ownership before issuing the eSIM profile.
Cautions and Things to Verify First
Device must support eSIM hardware. This is a hardware requirement — a software update cannot add eSIM support to a device that lacks an eUICC chip.
Carrier must support eSIM reissue for existing subscribers. Not all carriers that offer eSIM for new activations also support converting existing physical SIM subscriptions to eSIM. Verify before starting.
eSIM QR codes may be invalidated after a download attempt. Scan only after you are ready to complete the installation. If the download fails partway, the code may be invalidated; if it is, request a new code from your carrier.
Some eSIM profiles have reinstallation restrictions. Once you delete an eSIM profile from your device, reinstatement requires another reissue from your carrier. Some carriers restrict re-provisioning frequency. Keep the eSIM profile active unless you have a reason to delete it.
Downtime is short but real. If you rely on your phone number for two-factor authentication (SMS codes from banks or other services), schedule the conversion at a time when you will not urgently need those codes.
Summary
| Step | Online | In-Store | Convert to eSIM (iPhone) |
|---|---|---|---|
| Start | Carrier website or app | Visit a carrier store | Settings > Cellular > Convert to eSIM |
| Identity verification | Account PIN, SMS code, or ID upload | Government photo ID | Device-based, carrier-dependent |
| Profile delivery | QR code, activation link, or carrier app | Staff-assisted, QR code or app | Automatic, in Settings |
| Physical SIM | Deactivated by carrier system | Deactivated by carrier system | Deactivated by carrier system |
| Typical time | Under 15 minutes | 10–30 minutes at store | Under 15 minutes |
To find eSIM-compatible plans, use SimFinder.
Related Guides
- What Is an eSIM? — How eUICC and the GSMA SGP.22 standard work, and which devices support eSIM
- Physical SIM vs eSIM — Full comparison of both technologies across activation, portability, and profiles
- How to Set Up eSIM on iPhone via QR Code — Step-by-step QR code activation on iPhone
- How to Set Up eSIM on Android via QR Code — Step-by-step QR code activation on Android
- eSIM-Compatible Devices — Full device compatibility reference for iPhone, Android, and tablets