About Unicom Base Station intercept 1122334455 string

In doing 3G program debugging encountered a message cannot be sent out of the situation.

1) 3G module for simcom 5216E
2) does not contain 1122334455 of the ASCII string can be received
3) a party using Unicom Mobile card will not receive 1122334455 of the command to return
4) Replace the mobile phone card (both receiving and sending with the mobile card) can receive a command with 1122334455 to return

Determine the module-independent.

Other:
In simulation, you can quickly test by modifying the data values of the memory directly. The advantage is that you don't have to recompile the code every time.

About Unicom Base Station intercept 1122334455 string