Those ten months of delay might have paid off.  The white iPhone 4, which goes on sale tomorrow, rocks a tweaked proximity sensor and slightly improved reception – if the non-scientific tests conducted by Italian-language site iSpazio are to be believed.

The above video claims that the white iPhone 4 model will automatically turn off its display when it detects an object such as your face or finger from a relatively larger distance compared to the black model which reacts to just nudging the face of the sensor.

As for the white iPhone 4 antenna performance, they noticed “a slight improvement” but it’s not conclusive. Another video after the break.

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