NSysInfo for Symbian 9.1
Software shows full information about your phone, such as firmware version, IMEI, signal strength, battery level, memory amount, processor and screen types. Also it lists all supported features.
Homepage: http://symbian91.euro.ru/en/
Screenshots off my E50, this tool shows you all kinds of geeky information about your handset. It can't (yet?) show some data like Cell ID, as it appears an app has to be Symbian Signed to get at that information amongst others. As we all know, Symbian Signing for freeware apps is a royal pain and most people don't want to bother.
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