Yes very dust magnet.
Xiaomi 15 not easy to find good tempered glass i still using the original sp while looking for good tempered for fingerprint unlock

Yup is a 256 variant

This depending on ur usage, for daily use it is more than sufficient storage for me

I end up bought from taobao tempered glass
Basically if finger dry sure fail to unlock

Thickness of tempered glass should below 0.25mm for ultra sonic finger print to work well.

Normally after applied tempered glass few situation will affect the fingerprint sensor

1) temperature of phone, sometimes when we recorded it work well at room temperature but when in aircond room, it may appear to be taken longer or fail to unlock

2) humidity, sometimes finger too dry also cannot jadi