Answer:
quality
Step-by-step explanation:
if i know about the phone or laptop quality and quantity then i can know which is important if i buy.
i can give you example by laptop. For example i want to get buy laptop. i should know about the quantity and quality. then if i choose quantity i can buy so many laptops if they are more than 3 laptops and i get it in low price. then i take it and i try to open the laptops for some other thing to do but they cant opened so it means it has lowest quality.
and if i choose the quality. may be i can't buy more than 1 laptops but the qulaity of the laptops is high so when i open the laptop it opened
Note
quality is the superiority or the quality level of a things.
quantity is the abundance or the quantity level of a thing