I am very new to wireless technology. I just need to know whether is it possible to query the APN settings with out calling the Operators both in the home network and also while roaming in order to configure the mobile to access the internet via GPRS. The APN settings should be obtained through SMS over the air (OTA). Please help me in solving this. Also direct me to the reference documents or sites available if any.

Thanks in advance,
kgvb