I've got a Nexus 7 (2013) wi-fi only tablet and it's still on 4.4.4. Software Update says it's up to date. Even my Moto X has now updated to Lollipop. Could anyone offer any suggestions as to why my Google device still won't update to the latest OS? I thought Nexus devices got the updates first. It's quite annoying having my phone and tablet on different OSes.