From Forum Nokia Wiki

PhoNetInfo is a software that retrieves detailed phone and network information. It runs on Symbian S60 3rd and 5th edition mobile phones.

Non-exclusive list of features:

• Phone manufacturer and model
• Firmware version
• Battery level and status
• SIM card status
• MMC and SD card information
• WLAN IP, MAC, MTU and speed
• Bluetooth MAC and device class
• IMSI and IMEI
• Network mode, signal strength
• Network name, cell ID and country code
• Camera information (hard- and software version, formats, etc.)
• Running tasks
• Active profile settings
• CPU speed / type and architecture
• Size of RAM and ROM
• ...

The application can be downloaded in two versions:

• Officially Symbian-signed version (initial release): http://www.patrickfrei.ch/phonetinfo/
• Unsigned version (with bugfixes and new features): http://www.patrickfrei.ch/phonetinfo/downloads_unsigned.html

Note: The unsigned version can be easily signed via Symbian Signed's "Open Signed Online" tool. A tutorial on how to sign PhoNetInfo can be downloaded here