depending on what a persons viewpoint on what a good life is depends on their answer to this question. if a persons viewpoint was that you need to be happy in order to live a good life and technology was what made you happy, which is also basically what Callicles says, then of course technology would be the thing enhancing your ability to live a good life. Opposite to this, if you view a good life as being self-disciplined, like Socrates, then people who are addicted to technology cannot be living a good life, therefore meaning that technology is undermining their ability to live the good life.