Redmi 4x - installation e/os not available?

Hello smu44 and tcecyk!
You motivated me to go on with the idea and today I was unlocking the phone, using the windows “Mi Unlock” software. It was successful!

Now I have to fix an issue… the phone is not able to make or receive calls! I read in the instructions that it is better to solve these problems before the installation of eos… so I am struggling to find a solution. It can depend on:

  • Mi account
  • SIM card
  • telephone app settings
  • network settings

It’s quite frustrating to see that a "smart"phone cannot make phone calls.