The border search exemption can't be used for general purpose law enforcement; only for determining if the person should be allowed to enter the country (inappl

The border search exemption can't be used for general purpose law enforcement; only for determining if the person should be allowed to enter the country (inapplicable to citizens) and for preventing countraband from entering the country. A wiped phone cannot contain contraband data, so the border search exemption cannot apply.