I have 2 mobile phone SIM cards from Bali. My niece went to Bali in January and used them, then we used them in late February. We are intending to return July/August, which I think if we don't use them for 3 months they are as good as dead. (if this information is incorrect, can someone please let me know).
Anyway, if anybody would like to use them in the next month or 2, I can post them (or 1 if you only want 1) to use, and then if you could post them back to me on your return. Hopefully I could use them when we go July/August.
I'm in Perth, but could post anyway in Australia if your interested.