Repairing the IMEI on your Sony XZ3 can be a challenging task, but it's doable with the right tools and guidance. Before attempting any of the methods outlined above, make sure to backup your data and create a backup of your current IMEI. Additionally, be cautious when using third-party tools and software, as they may potentially harm your device. If you're not comfortable with DIY repairs or if none of the methods work, it's recommended to visit a authorized Sony service center or a professional repair shop for assistance.