Sell your Samsung Galaxy phone

Remove the Google account and the Samsung account first, under Settings, Accounts and backup, Manage accounts, select the account, Remove account. If an account is still on the phone when it is reset, setup demands the previous Google credentials, which Samsung calls Google Device Protection. Reactivation Lock is a separate Samsung account feature tied to Find My Mobile, and Samsung's trade-in terms require both locks off and a factory reset before the device is sent. Walk through setup yourself before you compare Galaxy offers, because if it asks you for an account, it will ask the buyer too.

Unlocking the bootloader burns the Knox warranty bit from 0x0 to 0x1, and that fuse cannot be reset. Relocking, flashing stock firmware and Samsung service all leave it at 0x1, and Secure Folder and Samsung Wallet stop working on that device. A buyer can read the status in Download Mode as Knox Warranty Void. Buyers set their own policy here, and some decline rooted devices while others pay less. This is an eligibility and condition question, not a grade, since the grades stay Flawless, Good, Fair and Poor and each buyer applies its own criteria.

On an iPhone running iOS 14 or later, open Settings, General, About and read the Carrier Lock line. No SIM restrictions means unlocked, and a carrier name means the phone is locked to that carrier. Apple states that only the carrier that locked a device can unlock it. Android wording varies by manufacturer, so the reliable test is a SIM from another carrier, or asking the carrier. Carrier lock is separate from Activation Lock and from blacklist status, and it is one of the options when you compare phone offers.

Policies differ by carrier, and between postpaid and prepaid, so confirm on the carrier's own unlock page before relying on any timeline. As published, T-Mobile postpaid requires a device it sold, active at least 40 days and paid in full, and AT&T postpaid requires a purchase 60 or more days ago and paid in full. Verizon changed its postpaid unlock policy in 2026, so check its current terms. Prepaid waits are much longer, and all three also require that the device is not reported lost, stolen or blocked.

Offers are ordered by payout for the exact configuration you selected, highest first. No buyer pays for placement, and the order is never changed for commercial reasons. Buyers pay MDV a referral fee when a sale completes, and that fee changes neither what you are paid nor where an offer sits in the list.

The buyer does. MDV compares published offers and hands you off to the buyer's own site, where shipping, inspection, revised offers, returns and payment all happen under that buyer's terms. MDV never receives, inspects, wipes or pays for a device. Terms differ from one buyer to the next, so read the buyer's own page before you ship anything.