Who called from 5047045720

Some kind of "rewards" call.

Add me to the list: They called on my cell phone, it rang twice and they hung up before I could answer. So what did they gain by this?

BEWARE and BLOCK :  REWARDS REDEMPTION SOLICITATION or SCAM. They say you are eligible for a $100 reward card and the guy says they are a call rewards hotline. They ask for first/last name and zip code. NEVER GIVE OUT PERSONAL INFORMATION. Phishing scam

Same exact thing. Rang twice, nothing more

Ive gotten around 5 calls in the past couple months. All the same. Rings twice then hangs up