Can I buy 7 months of pulsa and top it up each month from Oz???? Anyone got suggestions...?
The simple way to get a business number that won't accidentally disappear is to get something like the Telkomsel Halo card what works with monthly billing. You can pay enough money onto the account to last all the time you are out of the country. If you put enough money onto the account, you can turn on global roaming. See
Telkomsel, Begitu Dekat Begitu Nyata.
There is a a bit of paperwork to get one (because terrorists use mobile phones?) - so it may be simplest to put it in the name of an Indonesian associate. I don't think there is any risk to this person (unless you are a terrorist perhaps).