If the "burner" is used near your home, work, or "normal" phone, the metadata will reveal the correlation.
Additionally, do not call anyone from both phones. See a story about the recent att data leak where text "to/from" and call "to/from" information was taken. That customer data was from 2022, so it is kept forever.
There are many discussions and books on spycraft to get familiar with before spending money that does not move you forward.
See posts from https://x.com/TonySeruga/status/1822058077421760687 Regarding how some meta data is utilized.
If the "burner" is used near your home, work, or "normal" phone, the metadata will reveal the correlation.
Additionally, do not call anyone from both phones. See a story about the recent att data leak where text "to/from" and call "to/from" information was taken. That customer data was from 2022, so it is kept forever.
There are many discussions and books on spycraft to get familiar with before spending money that does not move you forward.
Cat and mouse.
Thanks fren.