vivo X21
vivo X21 · Vivo
- SoC
- Snapdragon 660
- RAM
- 6 GB LPDDR4
- Resolution
- 2280x1080
- Android API
- 9 (28)
What this hardware actually means
Editorial interpretation generated from the device's self-reported fields and our SoC tier database. Cross-reference with the raw fields below; if you spot a contradiction, please tell us.
Platform & performance positioning
The vivo vivo X21 is built around the Snapdragon 660, a mid-range SoC from Qualcomm. It launched in 2017 on a Samsung 14nm LPP process. 2017-2018 popular mid-range SoC; the Mi A2 / Nokia 7 Plus generation.
Legacy mid-range; works for messaging and YouTube, struggles with modern banking and games.
Day-to-day workload
6 GB LPDDR4 of RAM is adequate for mainstream daily use; modern games may benefit from closing background apps. Display resolution is 2280x1080.
This record reflects Android API level 28 (9). Android 8–9 — legacy; many banking and DRM apps drop support at this level.
Trust & buying notes
If you're cross-checking a phone advertised as a vivo vivo X21, the fields most worth verifying are: Build.MANUFACTURER lowercase-equal to "vivo"; Build.SOC_MODEL set (Android 12+) and consistent with Snapdragon 660. For an automated check, run our Hardware Trust Score from the DevCheck AI app and compare its output against this entry.
Because this entry runs Android 9, treat it as a reference for older inventory: refurb shops sometimes flash old firmware to make a device look "stock," so a modern build date with this API level is a red flag.
Identity
- MANUFACTURER
- vivo
- BRAND
- vivo
- MODEL
- vivo X21
- PRODUCT
- PD1728
Operating System
- API
- 9 (28)
- KERNEL
- 4.4.153-perf+
- PLATFORM
- qcom
SoC / CPU
- SOC
- Snapdragon 660
- CPU
- sdm660
- CORES
- 8
- FAMILY
- Kryo-2xx-a73 Kryo-2xx-a53
- CLUSTERS
- 4 x 2.21 GHz 4 x 1.84 GHz
- CLOCK_SPEED
- 633 - 2208 MHz
GPU
- GPU_VENDOR
- Qualcomm
- GPU_MODEL
- Adreno (TM) 512
Memory & Storage
- RAM
- 6 GB LPDDR4
- FLASH
- EMMC
Display
- RESOLUTION
- 2280x1080
Sensors
- ACCELEROMETER
- LSM6DS3TRCTRC
- GYROSCOPE
- LSM6DS3TRCTRC
- MAGNETOMETER
- AK09911
- ALSPS
- APDS9151
- FINGERPRINT_SENSOR
- goodix_fp
Connectivity
- WIFI
- wcn3990
Audio & Power
- AUDIO
- ak4376-codec tfa98xx
- CHARGER
- bq24192_charger
Other
- SOUND
- sdm660sndcardcd
- MODEM
- 00059-SDM660_GEN_PACK-1.216870.1,00059-SDM660_GEN_PACK-1.216870.1
Related devices
Other phones in our database with similar hardware — same brand or same SoC.
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