Ok....got the 48V Phantom boost and..........NO CHANGE.
You got a what? Model number?... Link?
...A regular phantom power supply doesn't convert a studio mic into a computer mic. (A USB mixer or USB audio interface with XLR mic inputs and phantom power
does make a studio condenser compatible with a computer.)
A phantom power supply would normally be used with a mixer or PA system that does not have phantom power. Dynamic mics (like the famous Shure SM58) don't need phantom power so your typical PA system only needs phantom power if you want to use a studio condenser mic. There are also electret condenser stage mics that use a battery so they can be used with a PA system without phantom power. But again, stage mics are not compatible with a soundcard/laptop.
(even though you made fun of my mike choice

)
We are struggling with the incomplete/conflicting specs/instructions. And, you're struggling to make it work.
I told you that you probably bought the "wrong mic". And, it is a "cheap mic" and it's not a name-brand. Maybe it's defective??? It
seems to be a "phantom-powered studio mic", and
you don't have the equipment for a studio mic... You don't have XLR inputs and you don't (didn't) have phantom power...
Maybe you can make it work with the right "adapters"... I don't know...
I feel like you're digging yourself into a hole...
If you have a limited budget, a regular analog or USB computer is probably a better choice. You can get a computer mic from a computer store, an office supply store, or any place that sells computer accessories.
If you can spend more, a USB "podcast mic" (starting at about $100) is a better choice.* Or, a studio condenser (from a "known" manufacturer, starting at about $100) along with a proper USB interface (starting at about $100). You can get this better equipment from places that sell musical instruments, PA systems, and equipment for audio recording.
* Podcast mics have their limitations too... They are not perfect for every situation, and sometimes the audio quality is not as good as a separate mic and interface. But in general, a $100+ podcast mic is way-better than a computer mic, or the mic built-into a laptop.
P.S.Although the "Excelvan BM-800 Condenser" is often advertised as a "studio condenser microphone", it isn't.
True!!! But, it's supposed to hook-up to a balanced XLR connection
like a studio condenser and it's supposed to operate from 48V phantom power
like a studio condenser.
It's unclear if it works, or if it only works poorly, with a soundcard/laptop connection. So far, it seems to work poorly with a computer and we don't know how well it would work with a proper interface or mixer.
And, it's pretty obvious that there's more money in the cosmetics & accessories than in the internal functional components.
