SELECT carrier FROM device WHERE software_platform <> 'Android'
Return the device carriers that do not have Android as their software platform.
CREATE TABLE shop (
    shop_id number,
    shop_name text,
    location text,
    open_date text,
    open_year number
)

CREATE TABLE device (
    device_id number,
    device text,
    carrier text,
    package_version text,
    applications text,
    software_platform text
)

CREATE TABLE stock (
    shop_id number,
    device_id number,
    quantity number
)