I would like to explain the synchronization behaviour of the Vodafone 555 Blue a bit further. With its default settings, customers should not be required to make any changes in order to get a great experience. Still there are some ways to finetune the experience and I would touch on them here:
The device will regularly connect to the Facebook servers and look for updates. The interval is fixed and can not be modified. As a customer you will see a little animation in the top of the status bar when the device is doing background transfers. It is worthwhile to understand that Facebook data is synchronized at different intervals. In every interval, the device will look for new messages, notifications and status updates in the newsfeed. Roughly four times per day, changes in the addressbook and other more static parts of the phone are fetched. This means that some pieces of data (e.g. a new friend) will not appear in the phonebook immediately.
These are the setting options (Facebook settings -> Background updates):
This is the most important information (messages, notifications, phonebook) and it is recommended to leave this on “auto”. Manual will give you a completely static experience and you will have to actively refresh the resepctive apps all the time.
This is setting will control the prefetching of the News Feed. If you leave this on “auto”, your news will be constantly loaded and you will see the counters going up automatically. If this is set to manual, the News Feed has to be refreshed to be updated. The benefit of manual refesh is that it will save GPRS data volume as a manual refesh will only poll the last 200 items max.
News Feed pictures
When we designed the device, we realized that pictures in the News Feed account for about 30% of all data usage. Setting this option to “Manual update” will only load images in the News Feed when they are viewed. The effect is a big savings in GPRS data volume for the cost of having to wait for the pictures to load while browsing.
News Feed picture size
Unfortunately Facebook does not provide a picture size that would exactly match the screen resolution of the Vodafone 555 Blue. Therefore we decided to go with a smaller size of images by default to make the experience really fast. If the default size is too small, you can change the picture size to high resolution. The effect will be that the device will load a much bigger picture from the Facebook server (about 4 times as big) which will look better for the cost of increasing the loading time and GPRS data usage. As a user, you can experiment with this setting to see what works best for you.