The Redmi 15 5G and realme P4x 5G both list 7,000mAh batteries and 144Hz displays, but they differ in screen size, charging speed, chipset and storage. The Redmi’s 6.9-inch screen and Xiaomi’s stated software-support period may suit some buyers; the P4x lists 45W charging and UFS 3.1 storage. Neither is a proven overall winner based on the available specifications alone.
Redmi 15 5G vs realme P4x 5G: key 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 camera (f/2.2) | 50MP rear camera; 8MP front camera |
| Storage and memory | 6GB+128GB or 8GB+256GB; LPDDR4X RAM and UFS 2.2 storage | UFS 3.1 storage; 256GB highlighted on realme’s page. The comparison listing also reports 128GB and 256GB options. |
| Software | HyperOS 2 based on Android 15; Xiaomi states 2 years of OS updates and 4 years of security updates | Based on Android 15; the cited product page does not state a support duration |
| 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 listing. Availability can vary by seller and configuration, so check the exact variant being offered.
As an Amazon Associate I earn from qualifying purchases.
Which phone has the better display?
The Redmi 15 5G has the larger display at 6.9 inches, compared with 6.72 inches on the P4x. Both are listed as FHD+ panels with 144Hz refresh rates. Xiaomi specifies 850 nits peak brightness for the Redmi; realme advertises 1,000 nits peak brightness for the P4x. These are manufacturer specifications, and the stated brightness figures may use different measurement conditions. They are not the result of a controlled, side-by-side display test.
Which has the faster processor and storage?
The Redmi uses Qualcomm’s Snapdragon 6s Gen 3, while the P4x uses MediaTek’s Dimensity 7400 Ultra. realme’s product page also claims an AnTuTu score of 780,000+, but that is a manufacturer-published figure, not an independently reproduced head-to-head benchmark. Chip names and vendor scores alone do not establish how the phones compare in sustained gaming, everyday responsiveness or heat management.
#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
Storage specifications favor the P4x on paper: realme lists UFS 3.1, while Xiaomi lists UFS 2.2 for the Redmi. Xiaomi specifies 6GB+128GB and 8GB+256GB Redmi configurations. realme highlights a 256GB configuration; the comparison listing reports 128GB and 256GB options for the P4x. Confirm the available RAM and storage combination on the exact regional listing before buying.
Battery capacity and charging: what differs?
Both manufacturers specify a 7,000mAh battery. The Redmi lists 33W wired charging and 18W reverse charging; the P4x lists 45W charging. That gives the P4x the higher stated wired-charging rate, while the Redmi is the one with a published reverse-charging specification. Charging speed and battery capacity do not establish which phone lasts longer in real use: no independently controlled head-to-head endurance result is established here.
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
Camera specifications and software support
Both phones list a 50MP rear camera and an 8MP front camera. Xiaomi describes the Redmi’s rear setup as a 50MP AI dual camera and specifies f/1.75; its front camera is listed at f/2.2. The P4x product page advertises 50MP rear and 8MP front cameras. These figures describe camera hardware, not image quality, and do not support declaring a camera winner without comparable photo testing.
Quick wins for a faster PC:
Clear out junk files and repair common Windows errorsFree Scan →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Repair Windows errors before they cause bigger problemsFix Now →Xiaomi specifies HyperOS 2 based on Android 15 for the Redmi 15 5G, with 2 years of OS updates and 4 years of security updates. realme’s cited P4x page says it is based on Android 15 but does not state an update-support duration. That means Xiaomi provides a clearer published commitment in these specifications; it does not establish that realme offers no updates.
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
Price difference: compare the same configuration
When 91mobiles’ comparison page was accessed in 2026, it displayed an Amazon price of ₹21,499 for the Redmi 15 and ₹21,939 for the P4x, making the displayed P4x price ₹440 higher. These are marketplace price snapshots, not confirmed live checkout prices or guaranteed offers, and the page does not establish that the listings were for equivalent storage configurations. Check both exact variants, stock and final checkout prices before treating the difference as a like-for-like comparison.
realme’s launch announcement, published November 26, 2025, said the P4x was set to debut on December 4, 2025: realme India’s P4x 5G launch announcement. Launch timing does not determine current availability or price.
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
Which should you choose?
- Choose the Redmi 15 5G on specifications if you want the larger 6.9-inch display, Xiaomi’s explicitly stated OS and security update durations, or its listed 18W reverse charging.
- Choose the realme P4x 5G on specifications if you prioritize the listed 45W charging, UFS 3.1 storage or its Dimensity 7400 Ultra chipset.
- Compare the exact listings before deciding on price: confirm matching storage and RAM, current stock, offers and checkout totals rather than relying on a displayed snapshot.
These are specification-based trade-offs. The cited sources do not provide an independently controlled comparison of performance, battery endurance, cameras or display quality, so they do not establish a tested overall winner.
Free tools Windows power users keep installed
One-click scans. No signup required.
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.
