SM-N920P galaxy note 5 sprint

After update to Marshmallow 6.0 my note 5 Sprint SM-N920P Do not import contacts from sim card . Sim card option is not present in import/export menu , why it is and How to
– Fixed Import, Export Contact from Simcard
– SMS Unlimited characters
– Auto APN
– Remove all Sprint apps and more
please help , or guide me how to get back to LP 5.1.1.