Not sure if anyone else is having this issue.  Attempted to activate two of the W215 smart plugs today.  Attempted one and received a message of "PIN number incorrect".  The number was obtained from the activation card and also the back of the plug as a verification.  Kept receiving the same message.  Thinking it might be an issue with one of the plugs, I tried with the other one.  Received the same message.
Just got off the phone with CS.  Stated that it was a "known issue" with ios8 / iPhone 6 and that the were working on the issue.  They offered a "work around" by "find a friend with an android and activate with your account".  LOL.  I am usually pretty open to "work around's" because software updates can be pretty dynamic....and I get that... however I found that resolution attempt pretty funny.  If this was a known issue, you would think they would announce that.
They are supposed to call be back within 24-48 hours.  We will see how that goes.