just came back from jogja. sharing some info on local sim card... i used telkomsel. had to get it from their outlet... search Grapari Telkomsel. they ran out of the tourist card, so had to get the regular one. cost was 41k total (10k starter pack, 6k stamp, 25k extra 1gb data). with free wifi at our hotel, that was more than enough for our 6 day trip.