In 1988, alloys of lanthanum, aluminium, and copper ore were found to be highly glass-forming. Al-based metallic glasses containing Scandium exhibited a record-type tensile mechanical strength of about 1500 MPa.[10]
find out november if its us but regardless good to see metal backs being used for wireless charging/5g and its for a mid tier/cost phone both an improvment over cheap plastic and expensive but fragile/smudging glass backs.