Apple Watch – Replacement eSIM ordered, activation fails

Hello O2 Community,

I recently replaced my previous Apple Watch with a new Apple Watch Ultra and would like to continue using my existing Multicard.

I initially ordered a replacement eSIM for my existing Multicard ("Neues Gerät 2") through Mein O2. The order was successful, and O2 provided a QR code for installation.

However, when I try to activate the cellular plan through the Apple Watch app on my iPhone, I encounter the following issue:

1. The app allows me to select my existing Multicard.

2. I select the replacement eSIM option, which shows €0.00 in additional charges.

3. When I confirm the order, I receive the following error:

"Entschuldigung, bei der Bestellung ist ein Fehler aufgetreten. Ihnen wird nichts in Rechnung gestellt."

I suspect that the replacement eSIM I ordered through Mein O2 is preventing the activation process from completing through the Apple Watch app.

I would like to keep my existing Multicard and avoid ordering an additional Multicard for €4.99/month.

Thank you for your help!

edit o2_Solveig 8 October 2026, 3.03 pm – moved from o2 SIM-Karte -> English Community