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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallThe Qin 1S is a genuine 2018 4G keypad phone, but it is not a conventional Xiaomi smartphone. Shenzhen Duoqin made it and promoted it through Xiaomi’s Youpin crowdfunding ecosystem. Its compact design, physical T9-style keys and limited software remain appealing; uncertain LTE bands, VoLTE support, aging batteries and the lack of current support make it a risky primary phone—especially in the United States.
What the Xiaomi Qin 1S actually is
The Qin 1S is the 4G successor to the 2G Qin 1. Xiaomi’s association came through Youpin and ecosystem promotion, while launch clarification identified Shenzhen Duoqin Technology as the maker rather than Xiaomi’s core handset division. See the launch clarification.
It is also unrelated to the Redmi 1S. The Redmi model was a touchscreen Android phone running MIUI, as shown by Xiaomi’s Redmi 1S product page. Qin 1S+ and later Qin/Duoqin phones are separate products with potentially different radios, software and batteries.
Specifications and launch context
The phone launched in China in 2018 through Xiaomi Youpin for 199 yuan. That is a historical launch price, not a 2026 market value; current listings are typically imported, used or old stock. Launch coverage is available from Gadgets 360 and The Indian Express.
#1 Best Overall
- USA MARKET ONLY WORK ON TMOBILE MINT TELLO OR ANY UNDER TMOBILE NETWORK PHONE NEEDS A SIM CARD ALREADY ACTIVATED ,OUTSIDE USA WORKS ANY GSM CARRIER SIM GSM FCC ID: 2AFZZRAD4G
- nano SIM 1 + Hybrid (nano SIM or microSD) Dual standby , n1/2/3/5/7/8/12/20/26/28/38/40/41/48/66/77/78 4G : B1/2/3/4/5/7/8/12/13/17/18/19/20/26/28/32/66 4G: LTE TDD: B38/40/41/42/48 3G: WCDMA: Band 2/4/5/8 2G: GSM: Quad Band.
- 6.77" AMOLED displayResolution: 2392 × 1080Refresh rate: Up to 120HzTouch sampling rate: 240HzBrightness: 3200 nits peak brightness, 800 nits (typ)Colour depth: 12 bitContrast ratio: 8,000,000:1DCI- P3 wide color gamutSunlight displayReading mode3840Hz PWM dimming｜16,000-level brightness adjustmentScreen-to-body ratio: 92%*Data obtained from Xiaomi Internal Labs. Actual results may vary.TÜV Rheinland Low Blue Light (Hardware Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Snapdragon 6 Gen 3 Mobile Platform4nm manufacturing process technologyCPU: Octa-core processor, up to 2.4GHzGPU: Adreno
- Virtual proximity sensor | Ambient light sensor | Accelerometer | Electronic compass | IR blaster | Gyroscope / GPS: L1 | GLONASS: G1 | BDS: B1I | Galileo E1 / Wireless NetworksBluetooth 5.3Wi-Fi Protocol: 802.11a/b/g/n/ac Supports 2.4GHz Wi-Fi | 5GHz Wi-Fi Wi-Fi Direct / In-screen fingerprint sensorAI Face Unlock
| Feature | Qin 1S information |
|---|---|
| Display | 2.8-inch IPS, 240×320 |
| Input | Physical T9-style keypad |
| Battery | 1,480mAh, commonly listed as non-removable |
| Claimed endurance | Up to 15 days standby and 420 minutes talk time; launch-era claims, not independent 2026 tests |
| Connectivity | 4G LTE, Wi-Fi, Bluetooth and GPS; regional configuration matters |
| Charging | USB Type-C |
| Processor | Spreadtrum/Unisoc SC9820E dual-core in some published specifications |
| Memory | Approximately 256MB RAM and 512MB storage in reported specifications |
| Camera | Commonly reported as absent; verify the exact unit |
| Software | Mocor 5 or an Android-derived feature-phone platform, not current full Android |
| SIM | Reports vary by edition; confirm the exact model |
Feature-phone software, not a tiny Android smartphone
The Qin 1S uses a lightweight Mocor 5/Android-derived environment. Android foundations do not provide a normal Google Play experience. Do not assume that Google Mobile Services, WhatsApp, banking, rideshare, modern navigation or streaming apps will install or function.
Launch material promoted Xiao AI and real-time voice translation. Those functions may depend on Chinese firmware, network access and remote services, so an imported handset should not be expected to provide them in every country. Marketplace descriptions calling the original phone “KaiOS,” “Android 11” or a full Android device are unreliable without a manual or direct device inspection; see the contemporary platform description from The Indian Express.
4G bands and carrier compatibility
“4G” on the box is not enough. You need the exact hardware version, its LTE bands, VoLTE behavior, carrier approval and local coverage.
Rank #2
- USA USERS: Only Works on TMOBILE - MiNT IN THE USA Market (Previous sim card activated) Outside USA 4G VoLTE Worldwide Unlocked Dual Nano sim . FCC ID: 2AFZZPC3EG -
- Dual Nano Sim + 1 Slot Micro SD 4G: LAtin Bands / 3G Quad Band Global / 2G: Quad Band Global - Supports 4G/3G/2G2G: GSM:2/3/5/8 --- 3G: WCDMA:1/5/8 --- 4G: LTE FDD: 1/2/3/4/5/7/8/20/28 / 4G: LTE TDD: 38/40/41
- 6.9" Dot Drop displayResolution: 1600*720Refresh rate: Up to 120Hz*Refresh rate can be adjusted to up to 120Hz for supported apps.Brightness: 660 nits (typ), 810 nits HBMReading modeTÜV Rheinland Low Blue Light (Software Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free CertifiedDC immingTouch sampling rate: Up to 240HzContrast ratio: 1200:1Color depth: 8-bit, 16.7 million colorsColor gamut: 83% NTSC
- MediaTek Helio G81-Ultra processorOcta-coreCPUCortex-A75+Cortex-A55Max CPU frequency: 2.0GHzGPUMali-G52 MC2
- 50MP main camera5P lensf/1.8Auxiliary lensRear camera video recording1080p (1920x1080) HD video recording at 30 fps720p (1280x720) HD video recording at 30 fps / 8MP front cameraf/2filmCamera | HDR mode | Soft-light ring | Portrait mode | Time-lapseFront camera video recording1080p (1920x1080) HD video recording at 30 fps720p (1280x720) HD video recording at 30 fps
One published specification lists FDD-LTE bands 1, 2, 3, 5 and 8 (Welte). Another listing mentions Band 40 and Bluetooth 4.2 (Gadgets 360). The conflict indicates that regional variants or inconsistent databases exist; do not merge the lists into a universal specification.
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The original Qin 1S was not designed for the U.S. market. Its commonly reported bands do not establish dependable nationwide coverage, and uncertainty around important U.S. bands—including Bands 4 and 12 in many deployments—makes service location-dependent. LTE data also does not guarantee voice: carriers may require approved VoLTE profiles and IMEI authorization. No evidence here establishes current AT&T, Verizon or T-Mobile certification for the original model.
The responsible conclusion is that it may obtain service in some places or on some networks, but it is not a dependable U.S. phone without carrier-specific confirmation and an IMEI test.
Rank #3
- Please be attention that screen protector is flexible plastic film, Not Tempered Glass.
- TPU material with smooth surface, keep you a high touch sensitive and fast fingerprint recognition.
- 4H Hardness can effectively resist daily scratches.
- Self-healing properties enable the film to recover from minor scratches and keep your screen brand new.
- Dust-free,bubble free,one-push super easily installation.
Pre-purchase compatibility procedure
- Ask for a photograph of the model and radio label on the exact unit.
- Request the complete LTE band list and whether VoLTE is enabled on its firmware.
- Use the intended carrier’s compatibility tool and obtain an IMEI check through a legitimate purchase or return process.
- Confirm a meaningful return period if voice service fails.
- Test outbound and inbound calls, SMS, LTE data and emergency calling; an LTE icon alone proves nothing.
Common network failures
- 4G appears but calls fail: VoLTE authorization, SIM provisioning, carrier approval, firmware or retired 3G fallback may be responsible.
- It works in one city but not another: the phone may overlap only one local LTE band.
- Travel use fails: roaming partners may rely on unsupported bands or carrier voice profiles.
Battery and everyday usability
The 1,480mAh cell is substantial for a small feature phone, but the 15-day standby and 420-minute talk figures are launch claims. LTE signal strength, VoLTE, Wi-Fi, Bluetooth, GPS, translation services and hotspot use change endurance. In 2026, battery age is often more important than nominal capacity; a sealed cell also makes replacement harder.
Physical keys make calling and short T9 messages straightforward, while the small screen discourages prolonged browsing. Trade-offs include difficult-to-read menus, slow long-form typing, untranslated imported menus and limited flexibility compared with even basic modern smartphones.
Who should buy the Qin 1S?
- Collectors of unusual Xiaomi Youpin or Duoqin hardware.
- Minimalist users who have verified local bands and VoLTE.
- People wanting a compact secondary phone in a region where the exact variant is supported.
Who should avoid it?
- Anyone needing dependable U.S. primary-phone service.
- Users who require Google Play, WhatsApp, banking, maps, rideshare or streaming.
- Parents who need guaranteed emergency contact and modern administration tools.
- Travelers expecting universal roaming.
- Buyers whose seller cannot identify the model, bands, firmware or return terms.
Qin 1S versus a newer minimalist phone
| Priority | Qin 1S | Newer purpose-built alternative |
|---|---|---|
| Distraction reduction | Strong | Usually strong |
| Physical keypad | Strong | Model-dependent |
| Modern apps | Weak | Model-dependent, usually clearer |
| Carrier certification | Uncertain by region | Often better documented |
| Software updates | Unclear and likely limited | Generally clearer support policy |
| Battery replacement and warranty | Weak for old imports | Usually easier to verify |
| Novelty and collectability | Strong | Lower |
For current options, investigate the exact model rather than assuming every newer Qin is compatible. Official destinations include Duoqin, Light Phone, Punkt MP02 and HMD. Confirm country-specific bands, VoLTE, warranty and pricing yourself.
Buying checklist
- Exact model is Qin 1S, not Qin 1, Qin 1S+, F21, F22 or another Qin.
- Complete LTE bands match the intended carrier.
- VoLTE and IMEI acceptance are confirmed.
- Firmware language and available services suit the user.
- Battery condition, charger and accessories are documented.
- Seller offers returns and has a credible reputation.
- Price reflects an old import rather than the historical 199-yuan launch price.
Verdict
The Qin 1S remains an appealing compact keypad phone and an unusual piece of the Xiaomi-Duoqin ecosystem. It is sensible only as a verified niche import, collector device or secondary minimalist phone. For a dependable primary phone in 2026—especially in the United States—a currently supported model with documented regional LTE and VoLTE compatibility is the safer choice.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
