Which of the following is NOT part of customer service best practices during repairs?

Providing a loaner device during repairs is not universally considered a standard customer service best practice, as it depends on the specific service policy of a repair center and the nature of the repair being performed. While offering a loaner device can greatly enhance customer satisfaction by minimizing inconvenience, it's not a requirement in every repair scenario and is not always feasible due to inventory or resource constraints.

On the other hand, capturing the device IMEI is essential for identifying the device and ensuring the correct service is provided. Performing a visual inspection is crucial for assessing the device’s condition and any potential issues prior to repair, which aids in proper diagnosis. Identifying warranty eligibility is also important to guide customers through their options and ensure they receive appropriate service without unexpected charges.

Thus, while providing a loaner device can be beneficial, it is not considered a fundamental best practice that aligns with the core elements of customer service during repairs, making it the correct answer to the question.