Aldi Mobile don't allow customers to check/manage their voicemail from alternate telephones such as landlines or other mobile phones, a great feature if you need to access your messages while overseas or can't take your mobile into work (working in a laboratory etc).

Both Telstra & Optus and many other providers offer this service, why not Aldi?  

Aldi even buy their mobile service wholesale from Telstra, it can't be that hard to switch on!