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ASUS ZenFone 8

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Cosmetic Condition:

Functionality:

Accessories included:

The ASUS ZenFone 8 (model ZS590KS), released in May 2021, was ASUS's "flagship in a compact body" — a rare small Android phone that packed a top-tier Qualcomm Snapdragon 888 chip, a 120Hz AMOLED screen, and IP68 water resistance into a 5.9-inch frame you can actually use one-handed. It stayed a cult favorite among people who wanted real performance without a giant phone. If yours is sitting in a drawer, it still holds resale value — and you can trade it in for cash with us. Your offer depends mainly on your storage size, carrier-lock status, and screen condition, so pick your exact configuration above for an instant quote.

Confirm you have the ZenFone 8 (not the 8 Flip)

ASUS launched two phones together in 2021 that are easy to mix up. Make sure you're on the right page before you request a quote — they're valued differently.

✅ This is the ZenFone 8 (ZS590KS)

  • Compact 5.9-inch screen — fits easily in one hand
  • Model number ZS590KS (sold as "ASUS 8z" in India)
  • Two fixed rear cameras in a small corner module — nothing flips or rotates
  • Has a 3.5mm headphone jack on top
  • Weighs about 169g; 8.9mm thick

❌ This is NOT the ZenFone 8 Flip (ZS672KS)

  • Larger 6.67-inch screen — noticeably bigger phone
  • Motorized flip-up camera that rotates the rear cameras to the front for selfies
  • Three rear cameras (adds a telephoto zoom lens)
  • No headphone jack; heavier at ~230g
  • If your camera physically flips up, you have the Flip — quote it on the ZenFone 8 Flip page instead.

Easiest way to check: Open Settings → System → About phone and look at the model name. You can also read the model number printed in tiny text near the bottom edge of the phone's back, or on the original box label.

Core specifications

Processor & performance

  • Qualcomm Snapdragon 888 5G (SM8350), octa-core up to 2.84 GHz
  • Adreno 660 GPU
  • LPDDR5 RAM + UFS 3.1 storage for fast load times

Memory & storage (this affects your offer)

  • 8GB RAM / 128GB storage
  • 8GB RAM / 256GB storage
  • 16GB RAM / 256GB storage (top configuration)
  • No microSD slot — storage is fixed, so the built-in capacity matters for resale value.

Display

  • 5.9-inch Samsung AMOLED, Full HD+ (2400 × 1080)
  • 120Hz refresh rate, 240Hz touch sampling
  • HDR10+ certified; Corning Gorilla Glass Victus protection

Battery & charging

  • 4000mAh battery (not user-replaceable)
  • 30W wired fast charging (QC 4.0 / PD 3.0)
  • No wireless charging on this model.

Cameras & extras

Cameras

Dual rear system: 64MP main wide (Sony IMX686, with OIS) plus a 12MP ultrawide. 12MP front camera in a corner punch-hole. Records 8K and 4K video. There is no telephoto zoom lens on the standard ZenFone 8 — that was exclusive to the Flip.

Build & extras

IP68 water and dust resistance, in-display fingerprint sensor, dual-SIM (nanoSIM), 5G, Wi-Fi 6E, Bluetooth 5.2, and a 3.5mm headphone jack. Colors: Obsidian Black and Horizon Silver. Ships with ZenUI over Android 11, upgradable to Android 13.

Snapdragon 888 5G 120Hz AMOLED IP68 Wi-Fi 6E 3.5mm jack

Frequently asked questions

01 How do I find my ZenFone 8's exact model and storage size?
Open Settings → System → About phone. The model name (and often the storage) is listed right there — the ZenFone 8 shows as ZS590KS. To confirm your storage capacity, go to Settings → Storage, which shows your total size (128GB or 256GB). If you're not sure of your RAM, the About phone screen lists that too. Pick the matching RAM/storage combination above so your quote is accurate.
02 What's the difference between the ZenFone 8 and the ZenFone 8 Flip?
They launched at the same time but are different phones with different values. The standard ZenFone 8 (ZS590KS) is the compact one — a 5.9-inch screen, two fixed rear cameras, and a headphone jack. The ZenFone 8 Flip (ZS672KS) is larger (6.67-inch screen), heavier, and has a motorized flip-up camera module that rotates the rear cameras around to act as selfie cameras, plus a third telephoto lens. The quickest test: if the camera housing physically pivots upward, you have the Flip. If it doesn't move at all, you have the standard ZenFone 8 and you're on the right page.
03 Can I sell my ZenFone 8 if it has a cracked screen or other damage?
Yes. Damaged phones still carry real value, either for repair or for parts, and we'd rather see them reused than tossed. As long as the phone powers on and isn't reported lost or stolen, we can make an offer — whether it has a cracked screen, a worn battery, scuffs, or dents. Just select the condition tier above that best matches your device (Good, Fair, or Damaged) and note any specific issues so your quote reflects the real state of the phone.
04 Did you know you can get real cash for an older ZenFone 8 instead of trading it to a carrier?
Many people don't realize that a compact flagship like the ZenFone 8 has a loyal secondary-market following, so it holds value better than a typical mid-range Android phone. A few things lift your offer: a larger 256GB storage size, a factory-unlocked device (unlocked phones work on any network and sell for more than carrier-locked ones), and a clean, crack-free screen. Unlike carrier trade-in deals — which usually pay in bill credits spread over 24 to 36 months and require you to buy a new phone — our ASUS trade-in service pays you real money with no strings attached, free insured shipping, and no obligation to buy anything.
05 How do I wipe my data before shipping, and how do I get paid?
First, back up anything you want to keep — photos, contacts, messages — to Google or a computer. Then remove your Google account so Google's Find My Device / factory-reset protection doesn't lock the phone for the next owner: go to Settings → Passwords & accounts, tap your Google account, and remove it. Take out your SIM card, then run Settings → System → Reset options → Erase all data (factory reset). Our team also runs a certified data wipe on every device we receive — you can read how on our data erasure protocols page. Once your phone arrives and passes intake testing, payment is approved within about two business days via PayPal, Venmo, Zelle, CashApp, or a mailed check. Your prepaid shipping label is free and fully insured.