@coderus

Many thanks for your quick response!

Perhaps I explained myself wrongly before; I only can get properly connected when I use the official whatsup app in a device running android OS.

I always use the same SIM card which it's swapped between the devices.

When I try to connect using Yappari app on a N900 I get what is displayed in the yappari.log from my prior post.

So I'm not sure about what you mean by "you need to delete official whatsapp on your device first, then register it in yappari"

What I did was first to uninstall offcial whatsup app from the android OS device while on-line, switch it off, exchange the SIM and after that try to connect via Yappari app on the N900... without succeeding

Did I follow your instructions correctly? If not, could you please elaborate a little bit more the right proceding?

It's very kind of you

Cheers!