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The Xiaomi Redmi 15 5G and realme P4x 5G both list 7,000mAh batteries and 144Hz FHD+ displays, but they make different trade-offs: Redmi offers a larger screen and a stated software-update commitment, while P4x lists faster charging, UFS 3.1 storage and a different processor. Neither is an evidence-based overall winner without comparable independent testing.
Redmi 15 5G vs realme P4x 5G: specifications
| Specification | Xiaomi Redmi 15 5G | realme P4x 5G |
|---|---|---|
| Processor | Qualcomm Snapdragon 6s Gen 3 | MediaTek Dimensity 7400 Ultra |
| Display | 6.9-inch FHD+ (2340 × 1080), up to 144Hz; 850 nits peak brightness | 6.72-inch FHD+, 144Hz; 1,000 nits peak brightness |
| Battery and charging | 7,000mAh typical; 33W wired charging; 18W reverse charging | 7,000mAh; 45W charging |
| Rear and front cameras | 50MP AI dual rear camera, f/1.75; 8MP front, f/2.2 | 50MP rear; 8MP front |
| Storage and memory | 6GB+128GB or 8GB+256GB; LPDDR4X RAM and UFS 2.2 storage | UFS 3.1; 256GB highlighted on the official page. A comparison listing also shows 128GB and 256GB options. |
| Software | HyperOS 2 based on Android 15; Xiaomi states 2 years of OS updates and 4 years of security updates | Official page states it is based on Android 15; update duration not stated there |
| Durability and weight | IP64; 217g | IP64 reported by the comparison listing; 208g and 8.39mm listed by realme |
Specifications are from the Xiaomi India Redmi 15 5G specifications and realme India P4x 5G product page, with variant and comparison details cross-checked against 91mobiles’ comparison page. Availability of configurations can vary by listing; check the exact RAM and storage variant offered before buying.
Which phone has the better display?
Redmi 15 5G has the larger panel at 6.9 inches, compared with the P4x’s 6.72 inches. Both specify FHD+ resolution and a refresh rate of up to 144Hz. Redmi may suit people who value more screen area for reading or video, while the P4x’s smaller listed size may appeal to those who prefer a more compact display.
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realme advertises 1,000 nits peak brightness, while Xiaomi lists 850 nits peak brightness. These are manufacturer specifications, and the sources do not establish that the figures were measured under the same conditions. They should not be treated as a controlled brightness comparison.
#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
Performance and storage: what the specifications indicate
The Redmi uses Qualcomm’s Snapdragon 6s Gen 3; the P4x uses MediaTek’s Dimensity 7400 Ultra. realme also publishes an AnTuTu score of 780,000+, but that is a manufacturer claim, not an independently reproduced head-to-head result. The available evidence does not establish which phone performs better in everyday use, gaming stability or sustained workloads.
Storage is a clearer paper-spec distinction: Xiaomi lists UFS 2.2, while realme highlights UFS 3.1. The comparison listing reports 128GB and 256GB options for both phones, but Xiaomi’s official specifications identify 6GB+128GB and 8GB+256GB configurations. Confirm the specific variant and its local availability rather than assuming every combination is sold.
Rank #2
- 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
Battery and charging: same listed capacity, different charging rates
Both manufacturers specify a 7,000mAh battery. Xiaomi lists 33W wired charging and 18W reverse charging for Redmi 15 5G; realme lists 45W charging for P4x 5G. On listed charging speed, P4x has the advantage. Capacity alone does not show which lasts longer: no independently controlled battery-life comparison is established here.
Camera specifications and image quality
Redmi’s listed rear setup is a 50MP AI dual camera with an f/1.75 aperture, paired with an 8MP front camera at f/2.2. realme advertises a 50MP rear camera and an 8MP front camera. These specifications do not establish which phone takes better photos or video; no comparable camera test is available in the cited sources.
Rank #3
- 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
Software updates and durability
Xiaomi specifies HyperOS 2 based on Android 15 for Redmi 15 5G and states 2 years of OS updates plus 4 years of security updates. The cited realme product page says P4x 5G is based on Android 15 but does not state an update duration, so the comparison does not establish an equivalent support commitment.
Both phones have IP64 listed in the cited specifications. IP64 is not an immersion rating, so do not interpret it as protection for submersion. The listed weights are 217g for Redmi and 208g for P4x; realme also lists the P4x at 8.39mm thick.
Rank #4
- 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: 2AFZZRA29G
- Dual SIM (nano SIM + nano SIM or nano SIM + eSIM) NO MICRO SD SLOT. 5G: n1/2/3/5/7/8/12/20/26/28/38/40/41/48/66/77/78 - 4G: LTE FDD: 1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B26/B28/B32/B66 4G: LTE TDD: B38/B40/B41/B42/B48 - 3G: WCDMA: B1/B2/B4/B5/B6/B8/B19 - 2G: GSM: B2/B3/B5/B8
- 6.83" 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
- MediaTek Dimensity 7400-Ultra4nm manufacturing process technologyCPU: Octa-core processor, up to 2.6GHzGPU: Mali-G615
- 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 / Front Camera 20MP front camera1/4" sensor sizef/2.24P lensFront camera video recording1080p at 30/60 fps720p at 30 fps
Price difference: treat displayed prices as snapshots
When 91mobiles’ comparison page was accessed in 2026, it displayed Amazon prices of ₹21,499 for Redmi 15 5G and ₹21,939 for P4x 5G—a ₹440 displayed difference, with the P4x higher. These are volatile marketplace listings, not confirmed checkout prices or a guaranteed comparison of matching RAM, storage, offers or stock. Check the live price for the exact variants before deciding; the cited snapshot does not establish today’s price difference.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsWhich should you choose?
Choose Redmi 15 5G if
- You want the larger, 6.9-inch display.
- You value Xiaomi’s explicitly stated OS and security update durations.
- You want the listed 18W reverse-charging feature.
Choose realme P4x 5G if
- You prioritize the listed 45W charging rate.
- You prefer the UFS 3.1 storage specification.
- You are considering its Dimensity 7400 Ultra platform, while recognizing that the cited performance figure is a manufacturer claim rather than a verified head-to-head test.
For a fair purchase comparison, match the RAM and storage configuration, compare current checkout prices, and decide which of screen size, charging, storage type and stated update support matters most. The cited specifications support a conditional choice, not a tested overall verdict.
Quick Recap
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: 2AFZZRA29G
- Dual SIM (nano SIM + nano SIM or nano SIM + eSIM) NO MICRO SD SLOT. 5G: n1/2/3/5/7/8/12/20/26/28/38/40/41/48/66/77/78 - 4G: LTE FDD: 1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B26/B28/B32/B66 4G: LTE TDD: B38/B40/B41/B42/B48 - 3G: WCDMA: B1/B2/B4/B5/B6/B8/B19 - 2G: GSM: B2/B3/B5/B8
- 6.83" 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
- MediaTek Dimensity 7400-Ultra4nm manufacturing process technologyCPU: Octa-core processor, up to 2.6GHzGPU: Mali-G615
- 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 / Front Camera 20MP front camera1/4" sensor sizef/2.24P lensFront camera video recording1080p at 30/60 fps720p at 30 fps
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.
