HmD pulse plus

So having my old phone cut off I've bought a new one. I've been back to the store for a new Sim card and it seems to have improved it a bit, but I'm here with full 4g reception and having to hotspot off my other device because I've got no internet connection.

So my question, has anyone else bought a HMD pulse plus and had similar issues? In all likelihood I'll be back there on m next day off for a warranty repair as this is ridiculous. Poor signal (compared to my old 4g phone or even my iPad) and spotty internet on a brand new phone is a pain.

Unrelated to Telstra, the people selling cases think they are universal so they sell the pulse pro case expecting it to fit. It doesn't.