Good news for those people who still have the old-style top-up cards for the subway in Bangkok. Originally you had to change to the new one by this week, but the MRT just announced that the deadline has now been extended until 30th December 2016. You can change your old card at any of the 18 Blue Line stations for free. The balanace on your old one will be transferred to the new MRT PLUS card. Once the new MRT Purple Line opens on 6th August, you will be able to use the card on both lines.