>>1451109I had this issue too, I couldn't get verification codes. I have an iphone so I don't know if this will work otherwise, but make sure these settings are enabled-
In settings, under Messages:
>iMessage>Send as SMSIn settings, under Phone:
>Wi-Fi CallingAnd make sure your phone number is set up correctly.
If you don't have a SIM card you might need to get one though.