***Hello!*** To deactivate call barring ******on your Xiaomi Note 10:
# Start with open the ***Phone*** app.
# Tap on the ***Menu*** (should be 3 dots or something similar)
# Go to ***Settings*** (inside the Phone app)
# Select ***Calling accounts***.
# Navigate to ***Advanced settings***.
# Choose ***Call barring***.
# Turn off the desired option (such as blocking all incoming or outgoing calls).
# If prompted, enter the call barring password provided by your network provider - might not need this.
# Tap ***OK*** to confirm and it should be fixed!
Hope this solves your network error aswell otherwise let me know!