Should I accept an unpaid Graphic design internship?

Hey, guys. I recently got an internship offer, I was really happy about it, because after graduating masters in graphic design I was looking for a job constantly in the field and this was the first company (after 2 and a half months of search) that contacted me back. During the interview I learnt that this internship is unpaid for 2-3 months (30hours a week), after that time I may get hired as a full time employee. What do you think, should I accept it?