Hello again...I found a solution myself. I tried the way with modemis.exe, but I haven't found any site to see how to use the program. Finally I found my solution
here, in the last comment.
And it was really easy.
1. I set up a new modem connection, with the number I want to dial (mine *99# , dunno if this step is important, but I thought it would be better to sure have an registry entry for this connection)
2. Go to HKEY_LOCAL_MACHINE\DRIVERS\Unimodem\Init
3. Right-click value 1 and select Edit (the value was before only AT< cr > without the spaces)
4. Change value data to :
AT+CGDCONT =1,"IP","websfr" (this is the information from the link above, in my case I entered the Username,PW and Domain already, so I thought I can skip this "IP","websfr" thing websfr is the APN. I only entered AT+cgatt=0< cr > without the spaces)
5. Softreset
And it worked for me
