iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
For the documented 4G versions, the Xiaomi REDMI 15C offers a larger screen, higher stated camera resolutions, microSD expansion up to 1TB and 33W fast charging. The OPPO A6x CPH2819 lists a larger 6500mAh typical battery, but does not support fast charging. Neither specification sheet establishes real-world performance, camera quality or battery life, and the available price listings do not support a reliable price winner.
Check the exact models before comparing
This comparison covers Xiaomi’s global REDMI 15C 4G specification page and OPPO A6x CPH2819 4G. “A6x” can also refer to OPPO’s separate 5G model, CPH2823, whose specifications should not be mixed with CPH2819. Check the model code, network type, country and storage configuration on the actual listing before comparing offers. Xiaomi’s REDMI 15C specifications, OPPO India’s A6x CPH2819 specifications, and OPPO’s A6x 5G CPH2823 page identify the versions covered.
The table compares the specifications listed on those pages; manufacturer figures are not independent test results. OPPO’s India and global CPH2819 pages are both relevant, but regional configurations and availability may differ.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →| Category | Xiaomi REDMI 15C (global 4G page) | OPPO A6x CPH2819 (4G) |
|---|---|---|
| Network | GSM, WCDMA and LTE bands listed; this page is for the 4G model. | GSM, WCDMA and LTE bands listed; no 5G NR listed for CPH2819. |
| Chipset | MediaTek Helio G81-Ultra; CPU maximum 2.0GHz. | Qualcomm Snapdragon 685; Adreno 610 GPU. |
| Display | 6.9-inch, 1600 × 720, up to 120Hz; 660 nits typical and 810 nits HBM. | 6.75-inch, 1570 × 720, up to 120Hz; OPPO India lists 800 nits typical and 1125 nits HBM. |
| Cameras | 50MP rear main camera and 8MP front camera; rear video up to 1080p at 30fps. | 13MP rear wide camera plus QVGA monochrome camera, and 5MP front camera; rear video up to 1080p at 30fps. |
| Battery and charging | 6000mAh typical; 33W fast charging supported. | 6500mAh typical (6335mAh rated); fast charging unsupported. |
| Memory and storage | LPDDR4X and eMMC 5.1; listed configurations include 4GB+128GB and 8GB+256GB; microSD expansion up to 1TB. | OPPO India lists 4GB+64GB, LPDDR4X, UFS 2.2 and storage-card support. |
| Software | HyperOS 2. | ColorOS 15.0 on the specification pages reviewed. |
| Other listed features | IP64 dust and splash resistance, Bluetooth 5.4, headphone jack, dual SIM and microSD; NFC availability varies by market. | Bluetooth 5.0, headphone jack and dual SIM; OPPO India lists no NFC. |
| Dimensions and weight | 171.56 × 79.47 × 7.99mm; 205g. | About 166.6 × 78.5 × 8.6mm; about 210g. |
Specifications above are from Xiaomi Global’s REDMI 15C page and OPPO’s India and global CPH2819 pages. The manufacturers’ brightness figures use their own measurement conditions, so they are not a direct independent display test.
#1 Best Overall
- 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: 2AFZZRA3EL - NO NFC
- 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" FHD+ DotDisplayResolution: 720/1600 320dpi Refresh rate: Up to 120Hz**Refresh rate can be adjusted up to 144Hz for supported apps.Touch sampling rate: Up to 288HzBrightness: 700nits (typ) 850 nits HBMContrast ratio: 1400:1Colour gamut: 85% NTSCReading modeTÜV Rheinland Low Blue Light (Software Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Octa Core Helio G81 2.0ghz GPU Mali-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
Which phone has the better screen?
Both listed 4G models have HD+ displays with refresh rates up to 120Hz. The REDMI 15C has the larger stated diagonal at 6.9 inches, compared with 6.75 inches for the A6x CPH2819. OPPO India lists higher brightness figures: 800 nits typical and 1125 nits HBM, versus Xiaomi’s 660 nits typical and 810 nits HBM. Since these are manufacturer specifications measured under differing conditions, they do not establish which screen will look brighter in a side-by-side test.
How do their cameras compare?
The REDMI 15C lists a 50MP rear main camera and an 8MP front camera. OPPO lists a 13MP rear wide camera, a QVGA monochrome camera and a 5MP front camera for CPH2819. Both pages specify rear video recording up to 1080p at 30fps. These figures describe resolution and listed camera hardware; they do not establish image quality, low-light results or which phone takes better photos.
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: 2AFZZRA3EL - NO NFC
- 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" FHD+ DotDisplayResolution: 720/1600 320dpi Refresh rate: Up to 120Hz**Refresh rate can be adjusted up to 144Hz for supported apps.Touch sampling rate: Up to 288HzBrightness: 700nits (typ) 850 nits HBMContrast ratio: 1400:1Colour gamut: 85% NTSCReading modeTÜV Rheinland Low Blue Light (Software Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Octa Core Helio G81 2.0ghz GPU Mali-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
Battery capacity or faster charging?
OPPO lists a 6500mAh typical battery for CPH2819, with a rated capacity of 6335mAh. Xiaomi lists 6000mAh typical capacity for the REDMI 15C and support for 33W fast charging. OPPO says fast charging is unsupported on CPH2819. The larger listed capacity does not, by itself, prove that the A6x lasts longer in everyday use; the cited specifications do not provide comparable battery-life test results.
Free tools Windows power users keep installed
One-click scans. No signup required.
Xiaomi notes that whether a power adapter is included with the REDMI 15C depends on the local seller. OPPO India lists a charger in the box but also says package contents can vary. Check the specific seller’s package details rather than assuming either phone includes a particular charger.
Rank #3
- 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: 2AFZZRA3EL - NO NFC
- 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" FHD+ DotDisplayResolution: 720/1600 320dpi Refresh rate: Up to 120Hz**Refresh rate can be adjusted up to 144Hz for supported apps.Touch sampling rate: Up to 288HzBrightness: 700nits (typ) 850 nits HBMContrast ratio: 1400:1Colour gamut: 85% NTSCReading modeTÜV Rheinland Low Blue Light (Software Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Octa Core Helio G81 2.0ghz GPU Mali-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
Which offers more storage flexibility?
Xiaomi lists configurations including 4GB RAM with 128GB storage and 8GB with 256GB, plus microSD expansion up to 1TB. OPPO India lists the CPH2819 as 4GB+64GB with storage-card support; the cited page does not state a maximum card capacity. Compare the exact RAM and internal-storage tier offered in your market, and confirm card support and limits for that regional variant.
Performance, software and practical differences
The REDMI 15C’s listed chipset is MediaTek Helio G81-Ultra, while the A6x CPH2819 lists Qualcomm Snapdragon 685 and Adreno 610 graphics. Chip names alone are not enough to establish which phone feels faster: the cited pages provide no comparable benchmark or hands-on performance results. The phones also use different software—HyperOS 2 on Xiaomi’s page and ColorOS 15.0 on OPPO’s reviewed pages—so interface preference is personal. Those pages do not establish a software-update duration.
Rank #4
- 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: 2AFZZRA3EL - NO NFC
- 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" FHD+ DotDisplayResolution: 720/1600 320dpi Refresh rate: Up to 120Hz**Refresh rate can be adjusted up to 144Hz for supported apps.Touch sampling rate: Up to 288HzBrightness: 700nits (typ) 850 nits HBMContrast ratio: 1400:1Colour gamut: 85% NTSCReading modeTÜV Rheinland Low Blue Light (Software Solution) Certified TÜV Rheinland Circadian Friendly Certified TÜV Rheinland Flicker Free Certified
- Octa Core Helio G81 2.0ghz GPU Mali-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
Xiaomi lists IP64 dust and splash resistance, Bluetooth 5.4, NFC with regional availability caveats, a headphone jack and dual SIM plus microSD. OPPO India lists Bluetooth 5.0, a headphone jack and dual SIM, but no NFC. If contactless payments or another NFC function matters, verify that NFC is present on the exact regional REDMI model; OPPO India’s CPH2819 specification page does not list it.
On the listed measurements, the REDMI 15C is thinner and lighter: 7.99mm and 205g versus the A6x’s approximate 8.6mm and 210g. OPPO labels its measurements approximate, and dimensions or weight can vary by configuration and measurement.
Best Value
- 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: 2AFZZRA8E
- Dual SIM (nano SIM + nano SIM or nano SIM + eSIM) (NoT MICRO SD SLOT) 5G: n1/2/3/5/7/8/20/28/38/40/41/48/66/77/78 / 4G: LTE FDD:1/2/3/4/5/7/8/12/13/17/18/19/20/26/28/32/66 -- 4G: LTE TDD:38/40/41/42/48 -- 3G: 1/2/4/5/6/8/19 -- 2G Quad Band - Bluetooth 5.4Wi-Fi: Wi-Fi 6/6E/Wi-Fi 5/Wi-Fi 4/802.11a/b/g Supports 2.4GHz Wi-Fi | 5GHz Wi-Fi Supports 2x2 MIMO，Wi-Fi Direct
- 6.83" CrystalRes AMOLED displayResolution: 1.5K (2772 x 1280)Refresh rate: Up to 120HzTouch sampling rate: Up to 480HzInstantaneous touch sampling rate: 2560Hz*Activated in Game Turbo modeBrightness: 3200 nits peak brightnessBrightness: HBM 1800 nitsColor depth: 12bitContrast ratio: 8000000:1DCI- P3 wide color gamut447PPICorning Gorilla Glass Victus 2Sunlight displayHDR10+ | Dolby Vision16,000-step automatic brightness adjustment3840Hz PWM dimming｜TÜV Rheinland Low Blue Light (Hardware Solution) Certified | TÜV Rheinland Circadian Friendly Certified | TÜV Rheinland Flicker Free Certified
- Snapdragon 7s Gen 44nm manufacturing process technologyCPU: Octa-core processor, up to 2.7GHzGPU: Adreno GPU
- 200MP main cameraOptical Image Stabilization (OIS)0.56μm, 16in1, 2.24μmf/1.77P lens1/1.4" sensor size8MP ultra-wide cameraf/2.2Rear camera video recording4K at 30 fps1080p at 30/60 fps720p at 30 fps - 32MP front camera1/3.6" sensor sizef/2.24P lensFront camera video recording1080p at 30/60 fps720p at 30 fps
Is there a reliable price difference?
No equivalent-model price difference is established by the available listing. 91mobiles displayed ₹17,499 for the Redmi 15C and ₹19,999 for the OPPO A6x on its comparison page, but these should be treated only as unverified examples, not current like-for-like prices. The same page described both phones as using MediaTek Dimensity 6300, which conflicts with Xiaomi’s global REDMI 15C 4G specification (Helio G81-Ultra) and OPPO CPH2819 specifications (Snapdragon 685). The listing may mix models, configurations, sellers or stale data. See the 91mobiles comparison listing alongside the manufacturers’ model-specific pages before interpreting those figures.
For a meaningful local price comparison, first match the country, 4G or 5G version, model code and RAM/storage tier, then compare current seller offers and package contents. A lower price for a different network model or storage configuration is not a fair comparison.
Which one should you choose?
- Consider the REDMI 15C if the features that matter to you are its larger listed display, higher stated camera resolutions, microSD expansion up to 1TB, or 33W charging support.
- Consider the OPPO A6x CPH2819 if its listed 6500mAh typical battery capacity is a priority and you are comfortable with the absence of fast charging.
- Check the regional variant carefully if you need 5G, NFC, particular carrier bands, or a specific storage tier; the A6x name includes distinct 4G and 5G models.
These are specification-based trade-offs, not a verdict on real-world speed, camera quality, battery runtime or value. A value winner depends on current, equivalent configurations in the buyer’s market.
Recommended Free Tools
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.
