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Conclusion
***To reassemble your device, follow these instructions in reverse order.***
After you've completed the repair, download the Samsung Members App from the Galaxy Store or the Play Store, and ++[document|27463|follow the Samsung Self -Repair document]++ (beginning page 9) to make sure your device is fully functional.
Download the ++[link|https://s3.amazonaws.com/ifixit-assets/static/standalone/samsung/GPT_GalaxyCal_release_1.0.1_usa.apk?1658807242|Galaxy Cal app]++ on your device and ++[document|27463|follow the Samsung Self -Repair document]++ (beginning page 24) to perform a battery cycle reset.
Take your e-waste to an [[E-Waste|R2 or e-Stewards certified recycler|new_window=true]].
Repair didn’t go as planned? Try some [[Troubleshooting Problems After a Repair|basic troubleshooting]], or ask our [link|https://www.ifixit.com/Answers/Device/Samsung%20Galaxy%20S21%20Ultra|Answers community] for help.