Picking GSM real time GPS tracker (for pets) - Australia

I have seen a lot of them state that you have to pick a "version" - USA, Mexico, Australia etc. Sometimes Australia would not be available. Does this mean I need a particular version of a tracker to work on frequencies particular to Australia?

I am thinking of getting the Petrek3G because the website is Australian and it is one of the smallest GSM trackers I have seen (I need it small enough for a cat). Others I have checked out are super bulky and often say they need a subscription from them in particular (weird if all you need is a SIM with data).

I have bought a GSM tracker before and neither I nor people I gave it to could make it work here in Australia. And the instructions were dodgy as hell.

Do I need to look for one that works in Australia in particular? If so, what am I looking for exactly? Frequencies covered by the device?

Thanks!

 

I was not aware mentioning a name was advertising. I saw people mentioning tracker names everywhere, so I thought it was OK. I am having trouble editing my post to delete the offending material.

There are products mentioned in your signature. What am I missing here? Did you read my post? I am asking for help, not advertising... I feel like I am missing something here. Feeling rather silly.

 

I see. So I have to make sure the frequencies are 'local'. Maybe that's what they mean by Australian model, USA model etc. The tracker I have now stopped working and the company seems to have made a runner. I wonder if some satellites changed or something and the tracker did not update them.

The real-time GSM ones are like $280. I just want to be sure one I'm buying would work locally.