Originally Posted by
burningflames
Do note that you cannot rely on wifi currently because you need the Ehteraz app to be running and have a green QR code at all times when entering buildings (including to get into the airport). This requires a valid phone number and data connection when in Qatar.
My understanding is that as of recently, Qatar will accept the equivalent "green" code of other GCC countries' apps. BeAware from Bahrain, Al Hosn from UAE, Tawakkalna from KSA, etc.