On receipt of SMS messages, some the body parameter was not recognized was send in Unicode. That is because the sender has his/hers phone settings string set to UNICODE instead of GSM.
So I needed a translation from Unicode t0 string (ASCII), below the code:
string unicodeString = "0074006500730074";
string asciString = "";
for (int i = 0; i < (unicodeString.Length) - 1; i+=4) {
int asciNumber = Convert.ToInt32(unicodeString.Substring((i+2),2),16);
asciString += char.ConvertFromUtf32(asciNumber);
}
Response.Write("Unicode: " + unicodeString + "<br/>" + "String: " + asciString);
