My gf is accusing me of being on the phone when she calls because the phone sometimes rings differently. She claims it has a long double first ring. Whatever that means. I googled it and told her it's just Cricket trying to find a tower to connect to but she doesn't believe me because Verizon does the double ring according to her. Is it true that there is a different ring callers hear if I'm on a call already? Is this a feature something I can change?