Hi Felix,
So , it turns out to be a phone issue of some sort.
After talking to support , they said the obi device was fine and asked me to try the *** and see if i can reach menu for the obi device.
That did not work.
So , i thought i would give this a try with another hand set.
Before that , just out of curiosity , i started to add one more * for everything on this one.
So , * + echo test number or * + "***" for the obi menu.
Both worked ..
Even for the device registration , i used the same trick added one more star before the number obitalk provided on the screen. Now , i have the device added .. no problem at all.
So , in my case that was the solution. And definitely a trial and error one , or i don't know much abt my hand set ..
Thanks
Karthik.