Hi Amanda,
If you do not know a lot of confidential information about the SIM card, including SIM OTA keys, you will be unable to generate the security header with cryptographic checksum and maybe...

Hi,
I have not checked in detail the SIM OTA command syntax (I presume the SMS is sent in ENVELOPE mode with appropriate protocol_id).
Anyway, if you are using a SIM card provided by your network...

Hi,

Yes, Wap-Push is used by most content delivery platforms worldwide to send multimedia content: color logos, polyphonic ringtones, video, Java games.

The Wap Push includes the URL giving...

The SMS sent time is often set by the SMS-Center.

According to recipient location (the SMS-Center will get when sending the message), the SMS Center may adjust the send time in order to take in...

Hi,

A very good opensource program is Kannel (http://www.kannel.org) that includes both a SMS SMPP software and a Wap gateway. Well written, well documented and open source.

You could also...

Here is the UDH decoded:

%0B :total UDH length (here with 2 Information Elements IE)
%05 :Application port addressing 16 bits IE
%04: IE length
%23%F4 : source port address
%00%00 : receiver...

You could use SMS API (e.g. MCTEL API freeware at http://www.smsfax.com) to send an SMS from your application, the SMS may be a Wap Push (automatically generated) including a link to your URL
Daniel

Could you please give us the SMSC brand and protocol (UCP?, SMPP?)