Are you too on a quest to not spend more than $1.10/month for a mobile service? So now that you've got a heap of $30 Telstra starter sims (for $1 each) or $30 vodaphone sims (for $5) you probably need some cheap sims to port out and back to. Expiry on mine are all around late 2016. Enjoy.
BTW don't forget to grab some $30 vodaphone starter packs for $5 while there
https://www.ozbargain.com.au/node/199297
Update: Voucherking says probably nationwide. Stock up.
Update 2: confirmed nationwide Thanks bargain bot.
Don't want to sound stupid… I understand why people would want the starter packs with credit on them, but what's the point in these? Thanks