My parents moved overseas a few years ago but come back to Australia occasionally. As a result, I moved their original Vodafone plan to a 365 prepaid plan - I believe it was only $20 per recharge and it expires in 365 days. I forgot to recharge recently and so their sim expired. I checked on Vodafone and it seems like that prepaid deal is no longer available so I thought it would be a good chance to explore what else is on the market.
Essentially, they just want to keep their number. They don't really make any calls and mostly use social media apps to message or voice calls. Having said that, data isn't essential - they spend most of their time in areas with wifi and may only need it on rare occasions when they're outside. If they do need to make a phone call, they will use my phone or if they're outside, they'll call me and I'll call them back.
So based on that, hit me with your recommendations. If possible, I would like to stick with reputable companies.
The comments in this post should help.
I don't think much has changed in the last 2 months.