
Chapter 20: Registry-based WWAN API
System Properties Registry Settings
Psion Mobile Devices Developers Guide
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20.4 System Properties Registry Settings
The values described in this section are only available on Psion devices. Windows Mobile 6 Professional
does not support these values.
HKEY_LOCAL_MACHINE\SOFTWARE\PsionTeklogix\SystemProperties\Hardware
\WWAN\WWAN ESN
HKEY_LOCAL_MACHINE\SOFTWARE\PsionTeklogix\SystemProperties\Hardware\WWAN\
WWAN Firmware
HKEY_LOCAL_MACHINE\SOFTWARE\PsionTeklogix\SystemProperties\Hardware\WWAN\
WWAN IMEI
HKEY_LOCAL_MACHINE\SOFTWARE\PsionTeklogix\SystemProperties\Hardware
\WWAN\WWAN IMSI
HKEY_LOCAL_MACHINE\SOFTWARE\PsionTeklogix\SystemProperties\Hardware
\WWAN\WWAN SIM ID
20.5 Sample Source Code
As well as reading the registry values, your application can execute a function when a registry value
changes. The following C++ sample source code works for both Windows Mobile and Windows CE. Windows
Mobile has a better selection of APIs than Windows CE. For details on these APIs see the State and Broker
Value Name Value Type Description
Value REG_SZ The Electronic Serial Number (ESN) for CDMA modems in hexadecimal format.
The ESN uniquely identifies the CDMA WWAN modem (it is a hardware
serial number).
Value Name Value Type Description
Value REG_SZ The firmware revision of the WWAN modem.
Value Name Value Type Description
Value REG_SZ The International Mobile Equipment Identity (IMEI) for GSM and UMTS modems
in decimal format. The IMEI uniquely identifies the GSM / UMTS WWAN modem
(it is a hardware serial number).
Value Name Value Type Description
Value REG_SZ The International Mobile Subscriber Identity (IMSI) in decimal format. The IMSI
uniquely identifies the mobile subscriber.
Value Name Value Type Description
Value REG_SZ The SIM card identifier in decimal format. The SIM ID uniquely identifies a
particular SIM card. The SIM ID is also called ICCID (Integrated Circuit
Card IDentifier).
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