The amount you'll get for your Samsung Galaxy S21 Ultra 5G depends on the device's condition, storage size, carrier lock status, and any active security settings or locks. ecoATM pays instant cash at kiosks and uses real-time market pricing, so offers reflect current demand and condition and can often beat carrier trade-in values. Because offers are generated per-device at the kiosk (or from an online estimate), you'll see your exact cash offer when the device is evaluated. If you want a ballpark before you visit, use ecoATM's online price estimate first.

Selling your Samsung Galaxy S21 Ultra 5G at ecoATM is a simple five-step process: get an online quote, prepare your device, find a nearby ecoATM kiosk (they're in Walmart and other major retailers), connect the phone for an on-kiosk diagnostic, then accept or decline the offer. ecoATM provides an online price estimate to help you decide whether to visit a kiosk, and the kiosk runs diagnostics to produce an instant offer. If you accept, you get paid on the spot via cash, Venmo, or PayPal. If you decline, you simply keep your phone.

Yes — ecoATM accepts broken Samsung Galaxy S21 Ultra 5G phones, including devices with cracked screens, dents, faulty batteries, and other damage; condition will affect the offer you receive. If the kiosk cannot make a cash offer for a device, ecoATM will recycle it responsibly so it doesn't end up in a landfill. ecoATM evaluates each device and either pays you or ensures the device is handled through responsible recycling.

You can sell a carrier-locked Samsung Galaxy S21 Ultra 5G to ecoATM. "Carrier-locked" means the phone is tied to a specific carrier and may not be usable on other networks until unlocked. Locked phones typically receive lower offers than unlocked units because they have more limited resale options, but ecoATM will still evaluate and make a competitive offer based on the phone's condition and lock status.

Before you go to an ecoATM kiosk, back up your data, sign out of your Google and Samsung accounts, and disable any Factory Reset Protection or activation locks so the device can be fully evaluated. Remove your SIM card and any external storage, then perform a factory reset to erase personal data. ecoATM recommends these steps to ensure a smooth sale and an accurate offer.

You should factory reset your Samsung Galaxy S21 Ultra 5G before selling to remove personal accounts and data. ecoATM also performs additional data wiping on all devices before resale, processing them to industry-standard specifications to protect seller privacy. Taking these steps and following ecoATM's on-screen guidance helps ensure your information is fully removed.

If your Samsung Galaxy S21 Ultra 5G is in good condition, it will typically be refurbished and resold, extending the device's usable life and keeping electronics in circulation. Devices that can't be resold are recycled through certified e-waste partners, so toxic materials like lead and mercury are diverted from landfills. ecoATM's program helps reduce e-waste while giving your old device a second life.

The trade-in value of your Samsung Galaxy S21 Ultra 5G isn't fixed — it's based on factors like storage capacity, physical and functional condition, and whether the device is carrier-locked or unlocked. ecoATM gives you an instant cash offer at the kiosk (paid in cash or via Venmo/PayPal where available) rather than store credit, so you can see what your Samsung Galaxy S21 Ultra 5G is really worth before you commit. Start with an online estimate, then complete a quick on-site diagnostic at a kiosk to lock in your final trade-in value.