Repair guide Galaxy S21 (SM-G991B) - English - Rev.1.0

Calibrations

Touch Screen Panel Calibration When replacing screens, touch screen panel calibration is required to ensure accurate touch input. Touch screen panel calibration is available through the Self Repair Assistant app. In the Fold models, touch screen panel calibration is performed for both the main and cover screens. 1 Launch the Self Repair Assistant app. 2 Select the part that you have replaced and tap Next .

3 Check part and calibration and tap Next .

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