Guys, I've just discovered the EASIEST way to unlock memory on Wind ZTE, but writing it all in Greek would just be too hard for me. No need for drivers, fastboot, in fact you can do the whole process even without a computer if you have internet connection on your phone!
But I'm not going through the trouble of writing it only so the moderator deletes it. I need a confirmation from the mod that it's ok to post a guide in English.