Sadly, after upgrading to 4.4.2, I've found 2 problems: - Battery life is terrible. I temporary fixed it by disable Location service. - I cannot copy files to removable SDCard, got the permission error. Please fix bugs of the update asap. It's really annoying, cus' I don't know how to downgrade to 4.3 Btw, can some1 tell me how to downgrade back to 4.3, pls?
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