"Contact" could be used as a noun. It could be used as plural as in-
The more contacts the cloth has with the dirty surface, the more sploiled it gets.
"Contact details" is different. "Contact details" means the details like (1) address, (2) phone number, (3) email Id etc.
I often find the people using "contacts" for "contact details" as in-
I have lost my cell phone, so the contacts have been lost.
Evident enough, what the speaker wants to convey is that he has lost the contact details that were stored in his cell phone.
My question is: can "contacts" be used for "contact details"?