Probably electric supplier change scam, unsolicited call asks for callback and having statement ready, most likely will ask for account number off statement to "review" supply charges, DONT CALL THEM BACK (unless you want to waste their time without giving up any info), DONT SAY "YES" TO ANYTHING, DONT GIVE THEM ANY INFO, THEY WILL CHANGE YOUR SUPPLIER WITHOUT YOUR CONSENT USING ANY TIME YOU SAY "YES" IN THE CALL.
United States