Well, Sony is finally distributing the Android 5.1 update for its Xperia devices, and the first ones to receive are Z3 and Z2 series of devices, which includes compact and tablet versions also, if any (we’re looking at you Z3 Compact and Z3 tablet, and Z2 tablet). FYI, the build no. of the 5.1.1 update is 23.4.A.0.546.
If you haven’t received the received the OTA to 5.1.1 update yet, well, we’ve got you covered if the Xperia device your have in your hand is Z3. You can download the Android 5.1.1 update for Xperia Z3 rom below, and it’s available in two formats. First, firmware FTF file, which is your go if you want unrooted 100% stock 5.1.1 update. While, second is rooted stock ROM, which includes root access and the Dual Recovery.
And if you want to install the rooted ROM with recovery, then you already need a custom recovery like dual recovery, or TWRP or CWM or any recovery for your device. Transfer the ROM file to your device, and then reboot into recovery mode, so that you can use custom recovery to flash the ROM using its Install option.
If you need help, let us know via comments below.