The amount you can get for a Samsung Galaxy A21S depends on the device model, storage, cosmetic condition, carrier lock status, and security settings like Factory Reset Protection. ecoATM pays instant cash at the kiosk and its pricing is backed by real-time market data — it often beats carrier trade-in values for the same device. Exact offers vary by condition and market demand, so use ecoATM's online estimate or app to lock in a price before you go.

Start by getting a price estimate online or in the ecoATM app, then prepare your device for sale by removing accounts and personal data. Find your nearest ecoATM kiosk, place the Samsung Galaxy A21S in the machine so it can run diagnostics, and review the instant offer it gives you. If you accept ecoATM's offer you get paid on the spot in cash, PayPal, or Venmo, and if you decline you keep your phone.

Yes — ecoATM accepts Samsung Galaxy A21S units with cracked screens, dents, faulty batteries, water damage, or other problems, though the device condition will reduce the offer. Devices that won't power on can sometimes still receive a reduced cash offer, and if ecoATM cannot make a cash offer your device will be recycled responsibly. ecoATM either refurbishes items for resale or recycles them to keep e-waste out of landfills.

You can sell a carrier-locked Samsung Galaxy A21S to ecoATM, but carrier-locked phones typically receive a lower offer than unlocked ones because lock status affects resale value. "Carrier-locked" means the phone is tied to a specific wireless provider and that can reduce what buyers will pay, yet ecoATM will still make a competitive instant cash offer. If you can, unlocking the phone before selling may increase the amount you receive.

Back up any data you want to keep, sign out of your Google account and other services, and deactivate Factory Reset Protection so the phone can be reset and resold. Remove your SIM card, fully charge the device if possible, and perform a factory reset unless you lock in an offer through the ecoATM app. ecoATM also recommends bringing a state-issued ID when you sell at a kiosk.

You should factory reset your Samsung Galaxy A21S before selling to protect your personal information, and ecoATM also attempts additional data wiping on devices when technologically possible. ecoATM's processing center uses data-wiping tools and procedures before resale, but they recommend you erase the device yourself so you know your data is removed. ecoATM follows industry recycling and data-handling practices to reduce the risk of personal data exposure.

ecoATM evaluates every Samsung Galaxy A21S and many devices in good condition are refurbished and resold to extend their useful life. Devices that can't be resold are processed through certified e-waste recycling partners so materials are recovered and harmful components are kept out of landfills. This approach helps keep toxic materials out of landfills while giving a second life to many devices.

ecoATM calculates the trade-in value for your Samsung Galaxy A21S after checking the things that affect resale value. That includes storage, carrier lock status, screen and battery condition, whether it powers on, and any Samsung or Google account locks, along with the results of the kiosk diagnostic. An online estimate can help you decide whether it is worth the trip, but the final offer is made in person. Before you go, back it up, remove your Samsung and Google accounts, and charge it before visiting the kiosk so there are fewer surprises at the kiosk.