Hi, I got this Sony Xperia Z1s which I want to upgrade to lollipop, currently its android version is 4.4.2 the model of z1 is SO-01F (Docomo). Can someone please guide me to a step by step guide for installing lollipop ROM or a stable marshmallow for this model.
ps: I have tried the Xperia Companion, it has updated its software but android version remained the same
ps: I have tried the Xperia Companion, it has updated its software but android version remained the same
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