At the beginning of the year, Californian developer Mark/Space annouced a new package that allows users to switch "seamlessly" between smartphones, BlackBerrys or Windows Mobile devices to the iPhone.

Well now they have turned their attention to Symbian devices.

Missing Sync for Symbian allows users to synchronise information and files between a Mac and a Nokia, Sony Ericsson or Motorola phone running Symbian OS.

This new package is also the first Mark/Space product to feature Proximity Sync technology, which uses Bluetooth to sync data automatically when the devices are close to each other.

When the phone is in range of the Mac – within approximately 30 feet – Proximity Sync will connect via Bluetooth and synchronise the correct information.

The process is automatic and can happen with your phone still in your pocket.

Brian Hall, Mark/Space CEO explains: "I know people are going to love the ease of use brought by Proximity Sync. Just having your phone in the same room as your Mac from time to time is all you need to do to keep in sync".

You can sync your contacts, calendar events and tasks, and create to-do items, new contacts or events on either your phone, or your Mac.

If you have software for viewing images and documents, or playing MP3s and video, then Missing Sync for Symbian can manage those files too.

Other file types can also be synchronised to any folder on the phone or on the Mac. This means handheld applications such as Quickoffice or Adobe Reader LE will have access to files created on the Mac.

And the Missing Sync for Symbian archives your phone’s text messages and call log to your Mac.

The Missing Sync for Symbian is available as an electronic download from the Mark/Space online store for $39.95.