Ok so I did the stupid mistake of trying to downgrade my Samsung S5 (900I) from Marshmallow 6.0.1 to Lollipop 5. The reason I did this is because I did not like the UI of marshmallow and the battery life but anyways that dosent matter.
The problem started when I installed Lollipop through Odin and got stuck on the samsung logo. How ever I realised I just needed to download and install the firmware I was using before and all will be fine. NOPE. I reinstalled marshmallow and when I boot the phone on I get a message called "System UI has crashed" like wth can someone please tell me how I can fix this problem without throwing this phone at a wall. <3
Read more: Samsung S5 urgent help required!