Code: Requesting chunk of 50 contacts Contact Syncer Error: 6 Chunk received XML error: not an XML response Now that's funny. Have you tried to sync using 3G connection instead of WiFi? Error 6 is an SSL error, like for example the SSL certificate from the WhatsApp server can't be certified as genuine by the N900 (which is VERY weird). I don't think you've been messing with the CA certificates in your N900 so maybe you're in a network that hijacks SSL connections? Some networks from some companies do that to their employees to stop encryption and log everything the employee does (that's legal, since everything you do at work belongs to the company even your internet browsing). Apart from that, I don't have a clue why you're getting an SSL error.
Requesting chunk of 50 contacts Contact Syncer Error: 6 Chunk received XML error: not an XML response