The midlet either paints a black or a white screen. Switching happens when any key is pressed. Usefull? I don't know... maybe? (perhaps when stopping a buss in the dark!? or some sort of signalling). Full version turn into an effective disco flasher.
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Super File Manager freemium Free
Free, Safe, Small, Simple. One of the best File Manager apps on GetJar.
TheTruthSpy Cell Phone Spy Free
TheTruthSpy is a cell phone spy software, which captures all activities of the target phones.