All Symbian based Nokia S60, Sony Ericsson UIQ and Windows Mobile based devices sync only with Outlook. Fortunately for Windows Mobile, there is a free software called Finchsync which allows you to sync your Windows Mobile device with Outlook automatically. For Symbian based devices, we have to follow a two step process.

Step 1
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1) Download and install the free Zyb mobile client for your Nokia or Sony Ericsson mobile phone from https://zyb.com/
2) Synchronize your contacts to Zyb’s online server directly from your mobile device via GPRS

Step 2
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1) On your desktop computer, go to http://topologilinux.com/syncml/ and download a free extension called tsync for Mozilla Thunderbird/Seamonkey that allows you to sync your Thunderbird client to Zyb.com via SyncML

For Thunderbird 1-1.5,Seamonkey 1.0, the download link is- http://www.topologilinux.com/tsync/0.2/tsync.xpi
For Thunderbird 2 and Seamonkey 1.1, the download link is- http://www.topologilinux.com/tsync/cvs/tsync.xpi

2) In Thunderbird/Seamoney, Select Tools –>Extension and Install (choose tsync.xpi). Then Restart Thunderbird/Seamonkey.

3) Under options for this plug-in, setup your Zyb account and hit Sync.

That’s it! This way, you should be able to sync your Nokia and Sony Ericsson contacts to Mozilla Thunderbird indirectly.

See also: NokSync- Thunderbird extension to sync contacts between Thunderbird & Nokia PC Suite