Who called from 4848915628

Answered but nobody pitching a spiel.

Called 3x back to back. I didn't answer as they hung up after each initial ring and no message was left.

Have received two incoming calls. First time answered on third ring, but they had already hung up. Second day, incoming call rang about three times and then stopped. They did not leave voicemail. Telemarketers or scam?

Caller ID was "PAIN RELIEFGCM."  Presumed telemarketer.

Missed call; left no message.