I wanted to transfer my esim from Google pixel 4a device to my new device iPhone 14 device. 
Steps I followed:

• Logged in to Customer center
• Placed an order from esim to esim for  "device change"
• Confirmed "Place Order"
• Now, trying to go to settings of my SIM card to get the new esim profile but it is asking for mTAN .
• Problem: No network coverage on my existing device after placing the order and hence not able to receive mTAN and not able to transfer esim from one device to another.