Syriatel USSD at+cusd command response decoding

See more:

C#

ATCommands

Hello

I'm using at command to control a Nokia mobile phone as a modem.
My program involves with sending multiple ussd requests.
The response of MTN is decode-able, but with SYRIA-TEL is another situation.
the response is like this :

at+cusd=1,"*150*2*32391*69177*1#",15
+CUSD: 0,"ar?hb? ?'  10?@ ? ?hb@?J@@?@?? @f@??@?@S@d$@",17

OK

please help me i know that the response message is in Arabic.

this is a part of my code :

string send = "AT+CUSD=1,\"" + EncodeUCS2("*150*1*" + passSYR + "*1*" + qty + "*" + number + "*" + number + "#") + "\",15\r";
SYRport.Write(send);
System.Threading.Thread.Sleep(5000);
var data = SYRport.ReadExisting();

I'm sending it to a nokia x2 mobile modem with the serial-port SYRport.
the problem isn't code specific i think it related to the modem or the network provider.
please help.