How should I format the phone number in sql?

HOW CAN I FORMAT THIS QUERY AS '+55 111 222 33 11'

SELECT CASE

      WHEN SUBSTR (LTRIM (RTRIM (PPH.SEARCH_PHONE_NUMBER)), 1, 3) = '+55' THEN LTRIM (RTRIM ((PPH.SEARCH_PHONE_NUMBER))) WHEN SUBSTR (LTRIM (RTRIM (PPH.SEARCH_PHONE_NUMBER)), 1, 2) = '55' THEN  '+' || LTRIM (RTRIM (PPH.SEARCH_PHONE_NUMBER)) ELSE  '+55' || LTRIM (RTRIM (PPH.SEARCH_PHONE_NUMBER))  END

FROM PER_PHONES PPH

Thank you