Thinking of switching to MX

Hi all, I'm looking at switching my secondary phone line to MobileX. It's currently an e-sim on Tello's 2GB, unlimited text & minutes. It belonged to a family member who has passed, but it still gets plenty of phone calls and voicemails I need to deal with. I love Tello, but it's on TMo, and I recently switched my main line from Verizon to TMo (physical sim), so I want to switch the secondary line to a different network for more complete coverage. Sometimes I have poor or no reception or data on TMo indoors.

It sounds like MobileX's 2GB plan would be perfect for me?

And a few questions about voicemail - 1) how many minutes/messages does it allow, because someone in one of the subreddits said it was limited to 3 messages and 3 minutes total?? 2) How is VM accessed, by tapping a button on the app, or by dialing? The website only says how to set up VM on an iPhone, I have an S23 Ultra. 3) Can I access VM while using my TMo physical sim, without having to manually swap sims back and forth between TMo and MobileX? 3b) And can I access VM from another phone just by dialing a phone number; if so, is it my own number or a dedicated VM number?

Thanks in advance!

Edit: I did look through the FAQ and searched "voicemail". There's very little about it in there. Might want to include some of these questions and answers in there.:)

Edit edit: edited the word "edit". LOL.