Hi   Tony

For   
  1. Target application is down/unreachable or not responding,   the   error   would  be.

ESME UNREACHABLE

or 
USDC:NO REPLY from ESME

Kindly   note  that   the  USSD  string  is  correctly  configured   both  on  USSD  and  HLR  and   the  error  is  intermittent ( 40 %  cases)


On Thu, Sep 11, 2014 at 3:37 PM, Tony Likhanga via skunkworks <skunkworks@lists.my.co.ke> wrote:
@Alex, my guess is that there might be some hastily configured "Call-Cost notification system" involved. 

Probably, after making a call, the system triggers a USSD message to your handset while using a different encoding format from the one your handset understands - hence the message does not display on your handset. As a result, your handset is technically in an active USSD session that is later torn down after the session limit lapses.

I bet that if you can reboot your phone quick enough when experiencing this, then the USSD service will be accessible almost immediately.

Tony.



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