thanks for the reply.. for xperia z, i back up the content to my computer.. so, i am wondering if it is possible to transfer import it into nexus 5 from my computer directly..What kind of back up file? Are you using any app to backup your data? I used titanium backup, and it works. Whatsapp backups also work, but you have to transfer these files via USB first
Nv tried apps for backup before... So, after migrating the old data from your previous phone to nexus 5, were there any issues in particular?
I know Nexus NFC is different from most phone... Not sure if this is the reason.

