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Head to head

Nothing Phone (4a) ProvsXiaomi REDMI Note 15 Pro 5G

The short answer

Choose the Nothing Phone (4a) Pro for peak brightness and battery lifespan. Choose the REDMI Note 15 Pro 5G for more base storage and battery capacity. The REDMI Note 15 Pro 5G is £170 cheaper at UK RRP (£349 against £519). The Nothing Phone (4a) Pro gets security updates for longer: until March 2032, against January 2032 for the REDMI Note 15 Pro 5G.

Released
2026-03-05GSMArena — Nothing Phone (4a) Pro specifications, retrieved 2026-08-21
Price
£519Nothing UK store — Phone (4a) Pro, retrieved 2026-08-21
Security updates until
2032-03-05Nothing UK — Phone (4a) Pro, retrieved 2026-08-21
Released
2026-01-06GSMArena — Xiaomi Redmi Note 15 Pro specifications, retrieved 2026-08-20
Price
£349Xiaomi UK store — REDMI Note 15 Pro 5G (list / original price, 8 GB + 256 GB), retrieved 2026-09-12
Security updates until
2032-01-06Xiaomi UK — REDMI Note 15 Pro 5G, retrieved 2026-08-20

2 wins for Nothing Phone (4a) Pro2 wins for REDMI Note 15 Pro 5G1 gap borderline1 difference you won’t notice£170 apart at RRP

Verdict: Nothing Phone (4a) Pro ahead on 2 rows, REDMI Note 15 Pro 5G on 2 rows

On the makers’ published figures, the Phone (4a) Pro wins on peak brightness (5,000 nits against 3,200 nits) and battery lifespan (1,400 cycles against 1,000 cycles); the REDMI Note 15 Pro 5G wins on storage (base) (256 GB against 128 GB) and battery capacity (6,580 mAh against 5,080 mAh). One gap is borderline, a difference most people would not notice: battery per charge (63.4 h against 60.83 h) for the Phone (4a) Pro. The difference in fast charging is below the threshold you would notice. Both state the same weight, display size and RAM. The other 34 rows have no threshold or no direction to judge by, so nobody wins them.

True to scale

Phone (4a) Pro · 163.6 × 76.6 mmREDMI Note 15 Pro 5G · 163.61 × 78.09 mm

Outlines from each maker’s published dimensions, drawn to scale. Corner rounding is our drawing convention, not a measurement.

Specifications

A win is marked only where the figures can be ranked and the gap is one you could notice. A row the site has no threshold for says whether the two differ, and that it is not ranking them. = marks the same figure on both, ≠ not ranked a difference with no ranking. Every figure carries its source.

Body

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
DimensionsDiffers, but not ranked.
163.6 x 76.6 x 7.9 mmOfficial
163.61 x 78.09 x 7.96 mmOfficial
WeightSame.
210gOfficial
210gOfficial
BuildDiffers, but not ranked.
Aircraft-grade aluminium unibody; Corning Gorilla Glass 7i screenOfficial
Glass front (Gorilla Glass Victus 2), plastic back or silicone polymer back (eco leather), plastic frame3rd party
SIMDiffers, but not ranked.
Dual SIM, Nano-SIM (4FF); eSIM: Yes (excluding India)Official
Dual SIM (nano SIM + nano SIM or nano SIM + eSIM)Official
Water/dust ratingDiffers, but not ranked.
IP65Official
IP66/IP68Official
UnlockDiffers, but not ranked.
Fingerprint Sensor, In-screen optical scannerOfficial
In-screen fingerprint sensor, AI face unlockOfficial

Display

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Display typeDiffers, but not ranked.
6.83" flexible AMOLED, 144 Hz adaptive, 10-bitOfficial
6.83" AMOLED, 120Hz, 12-bit, HDR10+, Dolby VisionOfficial
Display sizeSame.
6.83inOfficial
6.83inOfficial
ResolutionDiffers, but not ranked.
1260 x 2800Official
2772 x 1280Official
Pixel densityDiffers, but not ranked.
450ppiOfficial
447ppiOfficial
Refresh rate
144HzOfficial
120HzOfficial
Peak brightness
5000nitsOfficialwins this row
3200nitsOfficial

Phone (4a) Pro is ahead here, by a gap you’d notice.

Typical brightness
800nitsOfficial
No verified data
Screen protectionDiffers, but not ranked.
Corning Gorilla Glass 7iOfficial
Corning Gorilla Glass Victus 2Official

Platform

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Operating systemDiffers, but not ranked.
Nothing OS 4.1 powered by Android 16Official
Xiaomi HyperOS 2Official

Xiaomi UK — REDMI Note 15 Pro 5G specs claims Xiaomi HyperOS 2 · GSMArena — Xiaomi Redmi Note 15 Pro specifications reports Android 15, HyperOS 2

ChipsetDiffers, but not ranked.
Qualcomm Snapdragon 7 Gen 4Official
MediaTek Dimensity 7400-Ultra (4nm)Official
CPUDiffers, but not ranked.
Qualcomm Kryo 8-core, up to 2.8 GHz (1 Prime up to 2.8 GHz + 3 Performance up to 2.4 GHz + 4 Efficiency up to 1.8 GHz)Official
Octa-core, up to 2.6GHzOfficial

Xiaomi UK — REDMI Note 15 Pro 5G specs claims Octa-core, up to 2.6GHz · GSMArena — Xiaomi Redmi Note 15 Pro specifications reports Octa-core (4x2.6 GHz Cortex-A78 & 4x2.0 GHz Cortex-A55)

GPUDiffers, but not ranked.
Qualcomm Adreno 722Official
Mali-G615Official

Memory

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Storage (base)
128GBOfficial
256GBOfficialwins this row

REDMI Note 15 Pro 5G is ahead here, by a gap you’d notice.

Storage optionsDiffers, but not ranked.
128GB/256GBOfficial
256GB/512GBOfficial
RAMSame.
8GBOfficial
8GBOfficial
Card slotSame.
No3rd party
No3rd party

Camera

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Main cameraDiffers, but not ranked.
50 MP main (f/1.88, 1/1.56") + 50 MP periscope (f/2.88, 3.5x optical) + 8 MP ultrawide (120°) + 32 MP frontOfficial
200 MP main (f/1.7, 1/1.4", OIS) + 8 MP ultrawide (f/2.2)Official
Main sensor resolutionDiffers, but not ranked.
50MPOfficial
200MPOfficial
Main apertureDiffers, but not ranked.
f/1.88Official
f/1.7Official
Main sensor sizeDiffers, but not ranked.
1/1.56"Official
1/1.4"Official
Telephoto
50 MP periscope, f/2.88, 1/2.75", 3.5x optical zoom, 7x in-sensor zoom, 140x ultra zoom, OIS & EIS, PDAFOfficial
No verified data
UltrawideDiffers, but not ranked.
8 MP, 120° FOV, 1/4"Official
8 MP, f/2.2Official
Front cameraDiffers, but not ranked.
32 MP, f/2.2, 1/3.44", 89° FOVOfficial
20 MP, f/2.2, 1/4"Official
Video captureDiffers, but not ranked.
4K Ultra XDR@30fps; 1080p Ultra XDR@30/60fps; slo-mo 1080p 120fps; time-lapse 4K/1080pOfficial
4K@30fps, 1080p@30/60fps, 720p@30fpsOfficial

Battery

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Battery capacity
5080mAhOfficial
6580mAhOfficialwins this row

REDMI Note 15 Pro 5G is ahead here, by a gap you’d notice.

Battery per charge
63.4hOfficial
60.83hOfficial

Marginal — most people won’t notice.

Claimed video playback
No verified data
27hOfficial
Battery lifespan
1400cyclesOfficialwins this row
1000cyclesOfficial

EU energy label (via GSMArena) claims 1000 cycles · Xiaomi UK — REDMI Note 15 Pro 5G claims 1600 cycles

Phone (4a) Pro is ahead here, by a gap you’d notice.

Fast charging
50WOfficial
45WOfficial

You won’t notice this difference.

Connectivity

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
Wi-FiDiffers, but not ranked.
Wi-Fi 6, 802.11a/b/g/n/ac/ax, 2.4G/5GOfficial
Wi-Fi 6, 802.11a/b/g/n/ac/axOfficial
BluetoothSame.
5.4Official
5.4Official
USBSame.
USB Type-C 2.0, OTG3rd party
USB Type-C 2.0, OTG3rd party
NFCSame.
YesOfficial
YesOfficial
PositioningDiffers, but not ranked.
GPS (L1), GLONASS (G1), BDS (B1I), GALILEO (E1), QZSS (L1)Official
GPS L1, GLONASS G1, BDS B1I, Galileo E1, QZSS L1, A-GPSOfficial

Misc

SpecificationNothing Phone (4a) ProXiaomi REDMI Note 15 Pro 5G
ColoursDiffers, but not ranked.
Silver, Black, PinkOfficial
Black, Glacier Blue, TitaniumOfficial
SAR (EU, head)
No verified data
0.95W/kg3rd party
Repairability (EU class)Same.
COfficial
COfficial
8 attributes neither phone has a sourced figure for

HDR peak brightness · OS versions supported · Google Mobile Services · Wireless charging · Geekbench 6 (CPU, multi-core) · AnTuTu benchmark · 3DMark Wild Life Extreme · DXOMARK camera score. Rows appear as sources are cited — a gap in our data, not a statement about either phone.

Questions

Is the Nothing Phone (4a) Pro better than the REDMI Note 15 Pro 5G?

On the figures, neither is better overall: the Nothing Phone (4a) Pro wins on peak brightness, 5,000 nits (Nothing UK) against 3,200 nits (Xiaomi UK) and battery lifespan, 1,400 cycles against 1,000 cycles (both EU energy label); the REDMI Note 15 Pro 5G wins on storage (base), 256 GB (Xiaomi UK) against 128 GB (Nothing UK) and battery capacity, 6,580 mAh (Xiaomi UK) against 5,080 mAh (Nothing UK). Every other row is borderline, too close to notice, or not ranked.

Which has the better battery?

The Nothing Phone (4a) Pro is ahead, narrowly: battery per charge, 63.4 h against 60.83 h (both EU energy label), a borderline gap most people would not notice. The REDMI Note 15 Pro 5G, by a gap you’d notice: battery capacity, 6,580 mAh (Xiaomi UK) against 5,080 mAh (Nothing UK).

Which is lighter?

Neither: both state 210 g for weight (Nothing UK and Xiaomi UK).

Which has the brighter screen?

The Nothing Phone (4a) Pro, by a gap you’d notice: peak brightness, 5,000 nits (Nothing UK) against 3,200 nits (Xiaomi UK).

Which gets updates for longer?

The Nothing Phone (4a) Pro gets security updates for longer: until March 2032, against January 2032 for the REDMI Note 15 Pro 5G. Sources: dates from Nothing UK and Xiaomi UK.

Which is cheaper?

The REDMI Note 15 Pro 5G is £170 cheaper at UK RRP (£349 against £519). Prices from Nothing Phone (4a) Pro: Nothing UK store; REDMI Note 15 Pro 5G: Xiaomi UK store.

The pairs a buyer of either phone would also weigh. Any two phones in the catalogue can be compared from the chooser.