Would you like to teach me about the AT commands that have the following function ?
AT Command’s functions
(1)Returns the current network system mode.
(2)Report the network system mode information.
1.no service
2.GSM
3.GPRS
4.EGPRS (EDGE)
5.WCDMA
6.HSDPA only
7.HSUPA only
8.HSPA (HSDPA and HSUPA)