In Reply to: some are still good posted by frank48 on Monday, 20. June 2005 at 15:14 Bali Time:
They do expire after the total active time expires and you lose your number.
Yours was possibly still within the total active time of 90 days or perhaps longer?...so credit remained & was able to be added & card reactivated after adding the new credit.
You probably had 60 days active time or more depending on amount last added(after that you cannot send sms or make calls but can receive) then additional 30 to recharge thus reactivating it.
All the locals I know that have Pro XL have stated they will lose their number if they do not add credit by the end of the total active time.