How can I downgrade from last update?! My phone it's absolutely rubbish now! After update when i receive a call the person that calls can't hear me! Phone it's frozen very often. I losing Internet connection data and wifi. Lot's of apps not working anymore. What's the reason to break something that work just fine? New update should improve the experience using a device with android. I'm very disappointed! I am a Samsung user for more than 10 years. This update it's the worst I ever seen!!!