Can the Sony Xperia Z3 be downgraded to Jelly Bean 4.4.2 kitkat?

I went from a Verizon Wireless Samsug S4 for the Xperia Z3 with T-Mobile. Part of the decision to go with Sony, has the ability to use the Mobile of Playstaion application with the Xperia line that employees of the store T-Mobile has been told by the representative of Sony. However, it seems that you can't use the application Mobile of Playstaion on Xeperia phones with Android OS to 4.4.2. Can the Sony Xperia Z3 be downgraded to Jelly Bean 4.4.2 kitkat? and is it possible without voiding the warranty?


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