Indonesia is divided into 3 timezones.
- WIB (Western Indonesia Time, GMT+7) is used in all of Sumatera and Java, as well as West- and Central Kalimantan provinces.
- WITA (Central Indonesia TIme, GMT+8) is used in South- and East Kalimantan provinces, Bali, Sulawesi, and East- and West Nusatenggara provinces.
- WIT (East Indonesia Time, GMT+9) is used in Maluku and Papua.
If you need to stay in touch with family of friends (or your boss) at home, you may want to consider buying a local SIM card (and phone).
Best coverage is provided by the three largest operators, Telkomsel, Indosat and XL. Using their VOIP access codes for international calls will save you 80%-90% on standard rates, and probably more on roaming charges when you use your home number. Data bundles can be bought for as little as approx. US$0.50 daily or US$10 monthly.
To call home dial the access code (01017 for Telkomsel, 01016 for Indosat, 01000 for XL), followed by counrty code and area/subscriber number (e.g. 0101712125551234 to call to the US with a Telkomsel number).
Larger hotels will have (WIFI) internet access, but may charge for this. More and more cafes and restaurants offer free WIFI service to customers.