Need Access to Voicemail and Calls Overseas - Boost V Coles V Woolworths 365d Prepaid?

Hi

I’ll possibly be overseas in December. I will need access to voicemail and on one day I’ll need an ability to answer or make a call back to Australia. I can’t unfortunately change my number with them.

I’m with Boost and discovered via another post they have wifi calling which should work. However, I am due to renew my 365d plan before leaving and considered coles or Woolworths as they are cheaper.

Coles offers a $25 roaming pack from what I can see but it’s unclear of fees or if wifi calling etc works.

Does anyone have experience with these prepaid plans and travelling? If one more reliable than the next or offers a roaming pack?

Realistically combined with wifi calling would probably work best.