This paper explores the critical issue of in-store technology failures and their impact on customer reactions in the retail sector. By employing multiple linear regressions, it predicts specific customer responses to these service failures. The analysis draws on data from the “Voice of the Consumer: Digital Survey” (2020–2024) by Euromonitor International, covering over twenty countries. Our findings reveal that the most common in-store technology failures include ineffective customer calls, slow or malfunctioning electronic payment systems, and faulty or unavailable Wi-Fi. These failures lead to significant customer reactions such as reduced brand confidence, decreased purchases, and less frequent store visits. Notably, issues like slow or malfunctioning EPS, loyalty program problems (e.g., missing points or inability to redeem points), and incorrect online inventory information emerge as key factors influencing these reactions. The paper discusses both theoretical and managerial implications for retailers, highlighting the need for robust technology solutions to enhance customer satisfaction. Additionally, it outlines limitations and offers suggestions for future research in this critical area.