Before arriving to Indonesia, you need to register your phone. Government fight with illegal imported devices. Go to this site, fill out the form for each phone, and receive a QR code that you present at customs. 2 telephones per person, total price not exceeding 500 USD. Even iPhone – 350 USD, another Android phone – 150 USD, like example.

Actually, rules sounds like this: sign up new phones in a box upper 500 USD.