10 question survey for free samsanug s10 or iphone 11 legit or not?

I don't know why Cox...as a broadband provider...would invest in a survey about cellular service.

It does look like a scam but what was the scam?  How much personal information did you give?  Did clicking the link download something onto your phone?  Your OS may have good malware protection but I suppose a second program wouldn't hurt to scan.  There is a free version of Malwarebytes and it's reputable.  Can't hurt nothing.