SMS Subscribe unicode

I’m using jasmin as gw, as you know jasmin route sms as it is, it means playsms should convert coding to right format not jasmin
When send sms via compose message or auto reply or auto respond, playsms convert text to unicode correctly but in sms subscribe unknown text received

correct (auto reply):
&content=%063%06D%06%27%06E

incorrect (sms subscribe):
&content=سلام

Dear Anton, any reply?