Just found my answer below thanks Gary D

Posted by Tinggading on Friday, 8. May 2009 at 21:20 Bali Time:

In Reply to: Expiry time for Bali Sim credits posted by Tinggading on Friday, 8. May 2009 at 21:12 Bali Time:

Apparently it lasts for 4 months. Cheers Tinggading