After i tried to downgrade my MX4 via File Manager of meizu from, after the 50mb update, my phone is soft bricked. I can access to recovery mode but when i try to use upgrade it says checking firmware, upgrading and a big loop. when i try to clear data, it asks for a password and its not my password. i had password before and did system upgrade and it didnt ask me for a password. but now it asks and doesnt accept my own password. please help me.