Evidence gets excluded all the time for constitutional and 4th amendment violations, and LE is sued all the time for constitutional violations. Agencies are going to change their practices unless they want evidence excluded; they'll simply bag the phone and get a warrant.
Give some examples showing that this is what happens nowadays. Pure "good faith" exclusion usually apply to improperly-granted warrants, not to warrantless searches where no probable cause existed.
The standard for searches, as it says in the 4th amendment, is probable cause (that evidence relevant to the crime will be found in the thing/place to be searched).