Can't manage eSIM after installing new iPhone 12 from backup

The QR code provided for activating an eSIM can typically be used only once. Once it has been scanned and activated on a device, it becomes invalid for future use—even on the same device after a reset. If you need to set up your eSIM again (for example, after switching phones or erasing your current one), you’ll need to contact your mobile carrier. They can either issue a new QR code or guide you through an alternative activation method, such as manual entry of the eSIM details or using their official app, if available.

Pettak wrote:

Is there anyway to find out? My old iPhone 12 has eSIM support, I thought all series 12 had that?

Find your model number:

Find the model number of your iPhone, iPad, or iPod touch - Apple Support

If this is an iPhone 12 originally sold in China mainland, it does not have eSIM:

Identify your iPhone model - Apple Support

A2404 Is a model originally sold for China mainland, Macau, and Hong Kong, and like most phones for China mainland that model does not support eSIM, and eSIM cannot be retrofitted.

Pettak wrote:

It’s a A2403

That model iPhone should support eSim. If you can't set up an eSim on the phone, you need to contact your carrier to determine if they do support eSim and if your phone has been provisioned correctly for eSim.

Pettak wrote:

I can generate new qr-codes from my carrier but the new phone won’t recognize it. And there is no button in the iPhone menu for adding a new eSIM

Open Settings > General > About > Model - tap that twice to reveal a model number like A2606 and report it back here.

Contact your carrier for help with your eSim. Use someone else's phone to call them.

OK. I give up. Who cares about the QR code? If it doesn't work, CONTACT YOUR CARRIER.

Is this iPhone 12 a dual-SIM model? If so, there is no eSIM support, and none can be added.