Nothing much happened on the 4th day which is the last day of MWC, I did not go down to the conference because I will be flying back to Singapore that day.
Woke up at about 9am and went down for breakfast and went back up to my hotel room after that to get my stuff packed. I have requested for my transport to come at 2pm despite my flight is at 6.30pm as I wanted to claim tax refund (18%) and shop at Barcelona Airport!