Why Jelly Bean isn't coming through to your phone?

Vodafone Australia has announced five days ago that the new Jelly Bean update to 4.1.2 firmware is now being rolled out to Galaxy Nexus users. However, you may not have received it yet and If you are sitting there like I was waiting for the Vodafone update, it may be as simple as clearing the phone's cache. Once I did the following, the update was sitting there ready to be downloaded! I just wonder how many days ago I could have received the update if I just cleared the cache.

1. Go to Settings -> Apps -> All

2. Find Google Services Framework.

3. Tap on Force Stop.

4. Select Clear Data.

5. Head back to the Nexus 7′s Settings, go to About, and check for a System Update.