Baaubau is a city on the island of Buton in Southeast Sulawesi.
You will notice there is Korean writing on some building signboards or nameplates, and no, it's not because of "Korean Wave". Since 2009, the Cia-Cia language has adopted hangeul characters as their writing system, replacing Arabic script. This site's Korean phrasebook might give you a rough pronunciation guide.
The strongest Indonesian mobile operator with 4G signal is Telkomsel.
2nd-order administrative division
Primary administrative division