Help in GSM Shield

how to connect automatically the GSM sim900D in the network without pressing the power button? tnx

http://www.etteam.com/prod2013/et-ba...M%20SIM900.pdf

Turning ON/OFF only the supply of the SIM card should automatically register to the network. Have to check if this is possible to do in the software of the module.

Also there should be AT commands that allow to register without power ON/OFF:

http://www.zeeman.de/wp-content/uplo...ommand-set.pdf

the Gsm will automatic On the status and net light pin when connected to arduino without using codes to On it automatically in the program