Buy Certified Used and Unlocked Phones

Yes — every phone sold on UsedPhonesUSA is sold unlocked for use on major U.S. carriers (AT&T, T-Mobile, Verizon, and their MVNOs). We test each device for network compatibility and make carrier notes visible on the product page so you can confirm before purchase.

How we ensure compatibility

• We verify carrier-unlock status during our 40+ point inspection, and we record the phone’s IMEI/ESN status.

• Use our IMEI/compatibility checker (link this to your /check-imei tool) to confirm a specific phone will activate on your carrier. Enter the IMEI and we’ll return supported networks and any carrier restrictions.

• If a phone shows as unlocked but needs activation steps (e.g., APN settings or carrier provisioning), we include simple activation instructions on the product page.

Buying tips

1. Run the IMEI check before buying.

2. If you plan to use a smaller carrier or international SIM, confirm with the carrier; we provide direct links and notes for common carriers.

3. If there’s any compatibility concern, our customer service will confirm before shipping or help with returns under our 30-day policy.

Our grading system gives you a clear expectation of cosmetic condition and overall wear. Each grade is defined by visible condition, battery health, and functional checks performed during our certification process.

Grade definitions (detailed)

• Grade A — “Like New / Excellent”: Minimal or no visible scratches; screen, frame, and back look close to new. Fully functional, battery health typically 85%+. Includes full testing and original-style accessories when listed. Ideal for buyers who want near-new performance at a lower cost.

• Grade B — “Good / Light Signs of Use”: Minor cosmetic marks or small hairline scratches on the screen or body. Fully functional with no performance issues. Battery health typically 75–85%. A strong value option for most buyers.

• Grade C — “Fair / Visible Wear”: Noticeable scratches, blemishes, or small dings. Fully tested and 100% functional, but cosmetic wear is visible. Battery health may be lower but device is guaranteed to power on and operate. Best for budget-oriented buyers or secondary devices.

What we test for every graded phone

• Screen and touch responsiveness

• Cameras, microphones, speakers, and ports

• Battery health and charging cycles

• Radio and antenna performance (Wi-Fi, Bluetooth, LTE)

• Activation lock / Find My checks and factory reset

Each product listing clearly displays the grade, a short condition summary, and high-resolution images so buyers know exactly what to expect.

We use a strict, repeatable certification workflow to ensure every phone is reliable and ready for the buyer. Our standard is a 40+ point inspection that covers hardware, software, and network checks.

Inspection & certification process (step-by-step)

1. Incoming intake — Device received and recorded with IMEI/serial number.

2. Visual inspection — Screen, housing, buttons, camera glass, and ports are examined and photographed. Cosmetic grade assigned.

3. Battery and power test — Battery health, charge cycles, and thermal performance recorded.

4. Functional checks — Touchscreen, cameras (front/rear), microphones, speakers, vibration motor, sensors (proximity, accelerometer), charging port, and headphone jack (if present).

5. Network & modem test — Wi-Fi, Bluetooth, and carrier radio tested; unlock status confirmed.

6. Software & security — Factory reset performed; activation lock/Find My checks; latest supported OS applied where possible.

7. Final QA — A technician performs a runtime test and final cosmetic verification; photos are uploaded to the listing.

After certification

• We attach a grade label and upload condition photos.

• Product pages include full specs, testing notes (battery %, any replaced components), and warranty details.

Yes — we offer a trade-in program so you can sell your old phone and use the credit toward a purchase. Our trade-in process is simple, transparent, and designed to maximize value while minimizing hassle.

How the trade-in process works

1. Get an instant offer: Use our Sell/Trade-In page to enter make, model, storage, condition, and IMEI. You’ll receive an instant estimated offer.

2. Ship for free: If you accept the offer, we provide a prepaid shipping label. Package your device and send it to our inspection center.

3. Final inspection and payment: We verify the phone condition and IMEI. If it matches the description, we finalize payment (store credit or payout) or adjust the offer if there’s a discrepancy.

4. Use your credit: Apply trade-in credit immediately toward an order or receive payment via PayPal/bank transfer per our payout options.

What affects trade-in value

• Model and storage capacity

• Condition grade (screen, body, functionality)

• Carrier lock or outstanding balance (locked phones are worth less)

• Market demand for the model

Safety & privacy

• We perform a factory reset and data wipe on every trade-in device. Sellers are responsible for removing personal accounts and data before sending, but we also run secure data sanitization as part of intake.

Checking the IMEI (International Mobile Equipment Identity) is a critical step before purchasing a used phone. An IMEI check verifies carrier status, activation lock, and whether the device appears on lost/stolen blacklists.

How to check IMEI (quick guide)

1. Copy the IMEI: On the product page, we list the IMEI or provide a way to request it. For in-hand checks, dial *#06# or check Settings → About.

2. Use the IMEI checker: Enter the number in our IMEI/compatibility tool (link to /check-imei) to see lock status and carrier compatibility.

3. Look for flags: The tool will show if the device is reported lost/stolen, carrier-blacklisted, or has outstanding finance liabilities.

Why this matters

• A blacklisted or stolen phone can be blocked by carriers and may be confiscated or disabled. We never list devices shown as actively stolen or blacklisted. If any device is flagged during intake, it is rejected, and the seller is notified.

• For buyers, an IMEI check prevents activation issues and legal risks.

If you still have doubts

• Contact our support with the IMEI and order number; we’ll provide a full compatibility and history report prior to shipment.