Price depends on several factors including your Samsung Galaxy S21 Plus 5G's cosmetic condition, storage capacity, carrier lock status, and any active security settings. ecoATM gives an instant cash offer at the kiosk based on those factors and real-time market pricing, and because ecoATM pays cash (rather than in-store or bill credits) it often beats carrier trade-in values. Visit an ecoATM kiosk or check online for a quick estimate specific to your device.

First get a price estimate on the ecoATM website, then prepare your Samsung Galaxy S21 Plus 5G by backing up data and signing out of accounts. Next find an ecoATM kiosk (they're in thousands of locations including Walmart and other major retailers), connect your device for the kiosk diagnostic, and review the instant offer. If you accept, ecoATM pays you on the spot via cash, Venmo, or PayPal; if you decline, you keep your phone.

Yes — ecoATM accepts Samsung Galaxy S21 Plus 5G devices with cracked screens, dents, faulty batteries, and other damage, but the condition will reduce the offer you receive. If the kiosk cannot make a cash offer because the device can't be resold, ecoATM will recycle the Samsung Galaxy S21 Plus 5G responsibly so components don't end up in landfills. Selling a damaged device at an ecoATM kiosk is a quick way to get value or ensure responsible recycling.

Yes — ecoATM accepts carrier-locked Samsung Galaxy S21 Plus 5G phones, though locked devices typically receive a lower offer than fully unlocked units since a carrier lock restricts which networks the phone will work on. A carrier lock means the phone is tied to one carrier's network until it is unlocked; ecoATM will still run diagnostics and make a competitive cash offer based on the lock status and other condition factors. If you're unsure about the lock, the kiosk will detect it during the evaluation.

Back up any data you want to keep, remove your SIM card, sign out of your Google account (and any other accounts), and disable Factory Reset Protection before selling your Samsung Galaxy S21 Plus 5G. Once your data is backed up and accounts removed, perform a factory reset so the device is clean for diagnostics. ecoATM recommends these steps to help ensure a smooth diagnostic and accurate offer.

You should factory reset your Samsung Galaxy S21 Plus 5G before selling to remove personal content and accounts. ecoATM also performs additional data wiping on all devices it accepts before resale, with devices wiped to industry standards as part of their secure processing. Taking these preparatory steps plus ecoATM's post-acceptance wiping helps protect your personal data.

Devices in good condition are refurbished and resold, giving your Samsung Galaxy S21 Plus 5G a longer useful life and keeping it out of the waste stream. Devices that can't be resold are recycled through ecoATM's certified e-waste partners, helping keep toxic materials out of landfills. Selling at ecoATM supports reuse and recycling of electronics while giving you instant value for your device.

The trade-in value of your Samsung Galaxy S21 Plus 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 Plus 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.