yes exactly! he should create his own conf file like that of another registered n900 but will contain his own phone number and zip code. "phone number must be the one he previously registered with"
i really think yappari needs some sort of visual feedback on what's going on with contacts syncronisation, not a progress bar as such, but some text in the right hand corner will do, like the way it gives feedback about connection status, something that doesn't interfere, but at the same time easily accessible. one other thing is copy and paste in the message window. it would be a nice little thing to have
Official Whatsapp client doesn't show you when it's synchronizing contacts. The idea is that it should be transparent to the user. Whatsapp does it every hour, in Yappari automatic sync is disabled.
and I'll be getting a SGS3. Will I get into registration trouble on the Android Whatsapp?