Back Market is a big marketplace with thousands of listings from many different refurbishers. CPO Phones is one small U.S. business that tests, grades and ships every phone itself. Here's what that difference means for you.
At a glance
| CPO Phones | Back Market | |
|---|---|---|
| Who you buy from | One seller. LEK Telecom LLC in Parker, Colorado inspects, grades and ships every phone. | A marketplace. Your phone comes from one of many third-party refurbishers, and quality depends on which one. |
| Battery health | The exact tested battery health % is shown on the listing before you buy. | A guaranteed minimum per grade (80%, or 90% on Premium). |
| Battery floor | 85%+ on Grade A. 80%+ on Grades B and C. | 80%+ on Excellent, Good and Fair. |
| Grading | Three plain-English grades (A, B, C), applied by the same people to every phone. See our standard. | Four grades (Premium, Excellent, Good, Fair), applied by each seller under Back Market's quality charter. |
| Grade accuracy guarantee | If your phone doesn't match its grade, send photos within 30 days and choose a refund of the difference or a full refund with a prepaid return label. | Handled through the standard 30-day return process with the seller. |
| Talk to a person | Call 720-671-5507 (Mon–Fri, 9–5 Mountain) or email support@cpophones.net. Email replies within one business day. | Back Market customer care, with returns and repairs handled by the individual seller. |
| What we sell | A short, hand-picked catalog of unlocked Samsung and Google phones and tablets, checked for a clean IMEI with no carrier locks. | A very large catalog across many brands and categories. |
Why buy from CPO Phones
You see the battery before you buy. Battery health is the biggest thing that separates a good used phone from a frustrating one. We test every phone and post its actual number, not just a minimum.
One standard, one team. Every phone on this site is graded by us against one published standard. Phones that fail a functional check aren't downgraded; they're rejected.
A real business you can reach. We're a small Colorado company. If something's wrong, you call or email the people who tested your phone.
What you get either way
Both CPO Phones and Back Market offer 30-day returns, a minimum 80% battery health, and phones that are fully functional regardless of cosmetic grade. Our phones also carry a 90-day limited warranty, and we pay shipping both ways on covered warranty claims.
Back Market details are based on Back Market's published U.S. policies as of October 2026 and may change; check backmarket.com for current terms. Back Market is a trademark of its owner. CPO Phones is operated by LEK Telecom LLC and is not affiliated with or endorsed by Back Market.