DetailsCommunication and wifi
International access code for Indonesia is +62. The area code for Jakarta is 021. Buying a local SIM card is a good option as international roaming fees can be expensive. You may need to inform your network operator in advance of your trip so the “roaming” facility can be enabled. Indonesia offers a GSM-network for cellular telephones. Jakarta network uses the 900 or 1800 GSM system. Free wifi is available in most cafes, restaurants and hotels in central area, main places and tourist areas.