Welcome to the Sony Xperia Z2 help, troubleshooting and question and answer (Q&A) forum. This forum is meant to provide an area for any questions you have about the Sony Xperia Z2, and any XDA member may post in this section. If you have any questions about your phone that hasn't been answered previously, feel free to log into XDA and create a post in this forum. Make sure to check the search engine first before asking a question as it may have already been answered before.
Check out the mega FAQ thread which includes links to unlocking the boot loader and rooting guides, amongst others.