Heh, whenever I hear &quot;calibrate the screen&quot; I assume you either work at an Apple Store or have been to one recently, as that seems to be their favorite line.<p>Calibration is only necessary on a glass-only repair; it realigns the digitizer &quot;touch web&quot; with the top glass that you&#x27;re actually touching. That&#x27;s why we don&#x27;t perform nor recommend glass-only repairs.<p>When we repair a screen, we test every part of the digitizer before giving it back to the customer. We type on the keyboard, open apps, etc. If we find a dead spot, we replace it on-site. If by chance there&#x27;s something we missed on our test, that&#x27;s why our warranty exists.<p>If a customer finds a dead spot or the digitizer starts glitching, that&#x27;s covered under our warranty. And that&#x27;s why I recommend you find a shop with a good warranty. Most of them don&#x27;t test as thoroughly as we do, but even with testing, a small percentage of digitizers will still have issues a few days to a few weeks after the repair. A warranty will get you a no-hassle replacement as long as you haven&#x27;t cracked the screen.