User Instructions; At+Wfm Command; Using The New Value; Limitations - Wavecom GX64 Application Note

3

User Instructions

3.1

AT+WFM Command

To use the SIM speed enhancement, the feature must be enabled using the Wavecom
Feature Management command (AT+WFM). In the future this command may control
many configurable options but for now is only used for the SIM speed. The AT+WFM
command takes 2 parameters: a mode and a feature ID. The mode may be any of: 0
(disable), 1 (enable) or 2 (query status). Currently, the only supported feature ID is
"SIMSPEEDENH". The feature ID may be omitted for a mode of query status to get the
status of all features. Therefore, the command to enable the SIM speed enhancement
is:
The command to disable the feature is:
3.2

Using the New Value

The new setting for the feature setting does not take effect until the ME is restarted.
Therefore, the setting must be saved in the profile and the module restarted. This
may be done as:
After this restart, the new setting is used until a time that the setting is updated
again.
4

Limitations

The only known limitation of the SIM speed enhancement is that it may not work
properly with older SIMs. If the module can not read anything from the SIM after
enabling the feature, then the setting should be changed back to disabled and
another restart should be performed.
Gx64 APPLICATION NOTE
SIM Speed Enhancement
Page: 5/6
AT+WFM=1,"SIMSPEEDENH"
AT+WFM=0,"SIMSPEEDENH"
AT&W
AT*E2RESET
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