Oppo F1s 32GB very costly smartphone.it’s not affordable price. I just notice oppo F1s 32GB not upgrade to latest marshmallow6.1 android operating system.which has occur fingerprint sensor problem and oppo F1s has occur problem task manger when open any application on my smartphone then don’t close on the task manger applications.home button should be work with touch not pushing/pressing deeply the home. so never purchase to oppo F1s 32gb Thank you