How can I install eSIM using manual activation code on iPhone in iOS?

For iOS devices (including iPhone, iPad):

• Go to Settings > Cellular (or Mobile Data) > scroll down and tap "Add eSIM"
• Tap "Use QR code" > then finally tap "Enter Details Manually" and fill in the following:
  • • • • SM-DP+ Address: celitech.idemia.io 
        • Activation Code: XXXXX-XXXXX-XXXXX-XXXXX (provided with your QR code)