It might help if you copy and paste the code you're using to create your submitsm and read your deliversm? Sounds like you're setting the .ShortMessage property to an encoded Hex String instead of a standard string. Also, I believe the .Default option requires different encodings depending on the SM...

Use the below function to generate your ShortMessageBytes and change the DataEncoding to ASCII (GSM03.3.) [Edit: Added § to the encoding algorithm as it was missing.] i.e. req.ShortMessageBytes = GSMEncode("!£$%^&*()€"); public static byte[] GSMEncode(string PlainText) { // ` is not a conversion, ju...

Use the below function to generate your ShortMessageBytes and change the DataEncoding to ASCII (GSM03.38). i.e. req.ShortMessageBytes = GSMEncode("!£$%^&*()€"); public static byte[] GSMEncode(string PlainText) { // ` is not a conversion, just a untranslatable letter. // x0D should be CR but this cau...

Nevermind, wrote my own. Works a charm

Is there support for GSM 03.38 encoding or do I need to write my own?

Can you add events for when a SubmitSm, SubmitMultiSm, etc are actually sent? So you would get evSendData(object sender, byte[] data) followed by evSubmitSmSent(object sender, SubmitSm data) followed by evReceiveData(object sender, byte[] data) followed by evSubmitCompleted(object sender, SubmitSmRe...