So there is some software to switch the GPRS on and off, manually. However, for example when I get an MMS, it would surely failed because GPRS is off. I can to switch the DATA on, and download the MMS again. (Actually I don't know how to download the MMS manually if it has already been in auto download mode) Anyway, is there any software or setting to enable auto data switch on and off? just receive incoming MMS! after that, DATA GPRS should be off. Thanks!