An eSIM QR code is a single-use code issued by your mobile carrier that encodes an SM-DP+ server address and a one-time activation token. When scanned on a compatible device, it downloads and installs your eSIM profile over the air. It is not a general QR code and cannot be generated by third-party apps.
Log in to your T-Mobile account at t-mobile.com, go to your account lines, and select the line you want to activate. Look for the device or eSIM settings and choose the eSIM activation option when available. If the T-Mobile QR code is missing or expired, contact T-Mobile support to reissue it.
Log in to your AT&T account online or in the myAT&T app, navigate to device management, and select the device or line you want to activate. Look for the eSIM or activation section to access the activation QR code. Verify the current AT&T menu labels on AT&T's website because account flows change.
In My Verizon online or in the My Verizon app, go to Devices, Manage Device, and select the line you want to activate on eSIM. The eSIM or activation section should display or request your Verizon activation QR code. If the original Verizon code has already been used, Verizon support must issue a new one.
No. eSIM QR codes are single-use. Once you scan the code and activate your eSIM profile, the activation token is invalidated by the carrier's SM-DP+ server. If you need to transfer your eSIM to a new device, contact your carrier for a new activation code.
If you've lost your eSIM QR code, contact your carrier's customer support so they can invalidate the old code and issue a new one. Most carriers can reissue a code via support chat, phone support, or account portal. Do not attempt to use a screenshot of an already-scanned code because it will not work.
No. eSIM QR codes can only be generated by licensed mobile network operators because they require a valid SM-DP+ server address and a carrier-issued activation token. Third-party QR code generators, including QR-Build, cannot create functional eSIM activation codes. What you can create is a QR code that links to your eSIM activation guide or provisioning portal.
Open Settings, tap Cellular or Mobile Data, then tap Add eSIM or Add Cellular Plan. Tap Use QR Code, point your camera at the carrier-issued eSIM QR code, and follow the on-screen prompts. The process typically completes in under two minutes.
Open Settings, go to Network & Internet or Connections, then open SIM cards, SIM Manager, or Mobile Network. Tap Add eSIM or Download a SIM, then scan the QR code or enter the activation code manually. Samsung and Google Pixel devices use slightly different labels, but the activation flow is similar.
No. You should never share your eSIM QR code with anyone because it contains carrier activation credentials for your phone line. Treat it like a password or banking PIN. If you suspect the code was exposed, contact your carrier immediately to invalidate it.
A physical SIM is a removable card that stores your carrier credentials and must be inserted into your device. An eSIM is a digital SIM profile stored on a chip inside your device and activated remotely via a QR code or activation code from your carrier. eSIMs make it easier to add or switch plans without changing a physical card.
Businesses typically do not distribute the carrier-issued activation QR codes directly because those codes are unique per line and single-use. IT administrators distribute a QR code that links to the eSIM setup guide, MDM enrollment instructions, or the carrier business activation portal. A dynamic QR code from QR-Build is useful because the destination can be updated without reprinting.
Yes, but your carrier usually must issue a new QR code for the transfer. iPhone supports eSIM Quick Transfer in some carrier-supported cases, but Android or cross-carrier transfers commonly require a new activation code. Contact the carrier before wiping the old device.
SM-DP+ stands for Subscription Manager Data Preparation Plus. It is the remote provisioning server operated by your mobile carrier that stores your eSIM profile and delivers it to your device when you scan the activation QR code. The eSIM QR code encodes the SM-DP+ server address and a one-time activation token.
The already used error means the activation token in your QR code has already been consumed by a prior activation attempt or by a device you already set up. Contact your carrier to request a new QR code. The carrier will invalidate the old token and issue a fresh one.
An iPhone does not store the original eSIM QR code you received because the QR code is a one-time activation key, not a reusable file. If you need the QR code again for a new device, log in to your carrier account or contact carrier support. Your installed eSIM profile is visible in Settings under Cellular or Mobile Data.
You can scan a screenshot of an eSIM QR code if the activation has not been completed yet and the image is clear. If the code has already been used, a screenshot will produce an already activated or invalid code error. Use the original unused code whenever possible.
An eSIM activation code is the text-string equivalent of the eSIM QR code. It contains the same SM-DP+ address and activation token in a format you can type manually instead of scanning. Use manual entry when your camera is unavailable or the QR image cannot be scanned.
