Huawei AT-commandsThis is a featured page

note: Some devices like the Huawei K3715 seem to require AT-commands to be typed in capital letters!

There are a couple of options for disabling and re-enabling the following USB-components of Huawei USB-modems:

  • modem (M)
  • NAND-flashmemory drive (CD)
  • microSD-drive (SD)
  • PC UI interface (UI)
  • network adaptor (N)
  • smartcard (SC)
To disable or re-enable those components run the following AT-command, where n is one of the numbers from the table below:

AT^U2DIAG=n

On some models it is possible to read the present value of the parameter n by sending command:
AT^U2DIAG?

n M CD SD UI N SC remarks supported by not supported by
0 +

+


E160, E1750
1 + +






3 +

+
+ won't work on devices without SC*

5
+
+ +
won't work on devices without N*

9
+

+ + won't work on devices without N & SC*

10 + +


+ won't work on devices without SC*

12
+
+ +
won't work on devices without N*

255 + + + + ? ? reset to factory defaults E160, E160E, K3565, K3715 E176, E1762, E1750, E173
256 +
+ +

for most devices: everything enabled except the flashmemory; microSD-drive will be available under Windows even without drivers installed E160, E160E, E173, E1750, E1762, K3565, K3715 E176
257 + + +





259 +
+ +
+ won't work on devices without SC* E173u-2, E176
261
+ +
+ + won't work on devices without N & SC*

265
+ +
+ + won't work on devices without N & SC*

266 + + +

+ won't work on devices without SC*

267
+ +
+
won't work on devices without N*

268 + + + +

won't work on devices without N* E1750, K3565, E173
276 + + + + + ? reset to factory defaults E1762, K3565, K3765, E173, E1750

*) note: Smartcard (SC) and network adaptor (N) are not present in many Huawei devices. Using an AT-command that activates SC or N on a device without these components, will result in errors and so will be noneffective.


Modems supporting AT^U2DIAG? command: E173, E1750 ,E160E

Modems not supporting
AT^U2DIAG? command: E160, K3565

Also on some models it is possible to display a list of devices present in a USB-stick, by sending a command:
AT^GETPORTMODE


Chris_M
Chris_M
Latest page update: made by Chris_M , Jun 7 2014, 8:03 PM EDT (about this update About This Update Chris_M Edited by Chris_M


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