Just updated to 0.0.27 and it seems to be working ok .

I too had trouble getting yappari (0.25) to register, same problem as others reported earlier. I even recieved the sms 2 or 3 times but it still did not register. Unfortunately I do not have the log for that because I uninstalled and deleted everything and after the reinstall (still 0.0.25) it failed a few times and suddenly I did recieve the sms and registration worked.

I have not used it very much, chat and recieving pictures worked so nothing to complain about.

Edit: reason I didnt report registration problem earlier is because I was waiting for the 0.26 release to try the new method. Turned out it wasnt needed.