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Our Verdict
Analysis
Xiaomi 15 Ultra has the bigger display.
Overall Winner
Xiaomi 15 Ultra
Display Winner
Xiaomi 15 Ultra
Performance Winner
Tie
Camera Winner
Tie
Battery Winner
Tie
Value Winner
Tie
Specifications Comparison
| Feature | alcatel Go Flip 4 | Xiaomi 15 Ultra |
|---|---|---|
| Display size (in) | 2.80 | 6.73 |
| Main camera (MP) | 2.00 | 50.00 |
| Weight (g) | 133 | 226 |
| Thickness (mm) | 19.90 | 9.35 |
| Chipset | QM215 Snapdragon 215 (28 nm) | Snapdragon 8 Elite |
| OS | KaiOS 3.0 | Android 15, HyperOS 2 |
Pros & Cons
alcatel Go Flip 4
Xiaomi 15 Ultra
- Outstanding camera versatility
- Fast wired and wireless charging
- Bright display
- Heavy
- Software still polishing animations
- Limited availability in some regions
Every Spec, Side by Side
Specification
Alcatel
alcatel Go Flip 4
Xiaomi
Xiaomi 15 Ultra
Battery 3 specs
Type
Li-Ion 1850 mAh
Market-dependent versions:· Si/C Li-Ion 5410 mAh - Global· Si/C Li-Ion 6000 mAh - China
Capacity
—
5410 mAh
Charging
—
90W wired, 80W wireless
Body 5 specs
Dimensions
107.3 x 55.6 x 19.9 mm (4.22 x 2.19 x 0.78 in)
161.3 x 75.3 x 9.35 mm
Weight
133 g (4.69 oz)
226 g
SIM
Nano-SIM
· Nano-SIM + Nano-SIM· Nano-SIM + Nano-SIM + eSIM + eSIM (max 2 at a time)
Build
—
Glass front, glass-fiber reinforced plastic back or silicone polymer back (eco leather), aluminum frame
—
IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
Aerospace-grade glass fiber
Connectivity 8 specs
WLAN
Wi-Fi 802.11 b/g/n, hotspot
Wi-Fi 802.11 a/b/g/n/ac/6e/7, dual-band or tri-band, Wi-Fi Direct
Bluetooth
4.2, A2DP
6.0, A2DP, LE, aptX HD, aptX Adaptive, LHDC 5
Positioning
GPS
GPS (L1+L5), BDS (B1I+B1c+B2a), GALILEO (E1+E5a), QZSS (L1+L5), NavIC (L5), GLONASS
NFC
No
Yes
Radio
FM radio
No
USB
USB Type-C 2.0
USB Type-C 3.2 Gen 2, DisplayPort, OTG
Infrared port
—
Yes
5G
—
Yes
Display 5 specs
Type
TN TFT LCD
LTPO AMOLED
Size
2.8 inches, 24.3 cm2 (~40.7% screen-to-body ratio)
6.73 inches
Resolution
240 x 320 pixels, 4:3 ratio (~143 ppi density)
1440 x 3200 pixels
Second external TN TFT display, 1.44 inches, 128 x 128 pixels
—
Protection
—
Xiaomi Shield Glass 2.0, Mohs level 6
Launch 2 specs
Announced
2021, September
2025, February 27
Status
Available. Released 2021, September
Available. Released 2025, February 27
Main Camera 4 specs
Single
2 MP
—
Video
480p@30fps
8K@30fps, 4K@30/60/120fps, 1080p@30/60/120/240/480/960/1920fps, gyro-EIS, Dolby Vision HDR 10-bit rec. (4K@60fps, 1080p)
Features
—
Laser AF, color spectrum sensor, Leica lenses, Dual-LED flash, HDR, panorama, 67mm filter ring holder (optional)
Quad
—
50 MP + 50 MP + 200 MP + 50 MP
Memory 5 specs
Card slot
microSDHC (dedicated slot)
No
Internal
4GB 512MB RAM
256GB 12GB RAM, 512GB 16GB RAM, 1TB 16GB RAM
—
UFS 4.1
RAM
—
16GB
Storage
—
512GB
Misc 5 specs
Colors
Midnight Blue
Black, White, Silver Chrome, Green
Models
4056W
25010PN30G
SAR
0.78 W/kg (head) 1.27 W/kg (body)
—
Price
About 120 EUR
$ 693.75 / £ 1,295.00 / € 812.34
SAR EU
—
1.00 W/kg (head) 1.00 W/kg (body)
Network 7 specs
Technology
GSM / HSPA / LTE
GSM / HSPA / LTE / 5G
2G bands
GSM 850 / 1900
GSM 850 / 900 / 1800 / 1900
3G bands
HSDPA 850 / 1700(AWS) / 1900
HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands
2, 4, 5, 12, 25, 26, 41, 66, 71
1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 28, 32, 38, 39, 40, 41, 42, 48, 66, 71 - International
Speed
HSPA, LTE
HSPA, LTE, 5G
—
1, 2, 3, 5, 7, 8, 12, 20, 26, 28, 38, 40, 41, 48, 66, 77, 78, 79, 80, 81, 83, 84, 89 SA/NSA - China
5G bands
—
1, 2, 3, 5, 7, 8, 12, 20, 25, 26, 28, 38, 40, 41, 48, 66, 71, 75, 77, 78, 79 SA/NSA - International
Platform 4 specs
OS
KaiOS 3.0
Android 15, HyperOS 2
Chipset
QM215 Snapdragon 215 (28 nm)
Snapdragon 8 Elite
CPU
Quad-core 1.3 GHz Cortex-A53
Octa-core (2x4.32 GHz Oryon V2 Phoenix L + 6x3.53 GHz Oryon V2 Phoenix M)
GPU
Adreno 308
Adreno 830
Selfie Camera 4 specs
No
—
Features
—
HDR, panorama
Video
—
4K@30/60fps, 1080p@30/60fps, gyro-EIS
Single
—
32 MP
Sound 3 specs
Loudspeaker
Yes
Yes, with stereo speakers
3.5mm jack
Yes
No
—
24-bit/192kHz Hi-Res & Hi-Res Wireless audio
Qualcomm XPAN (24-bit/96kHz audio)
Eu Label 4 specs
Energy
—
Class A
Battery
—
58:58h endurance, 1000 cycles
Free fall
—
Class C (90 falls)
Repairability
—
Class C
Features 2 specs
Sensors
—
Fingerprint (under display, ultrasonic), accelerometer, proximity, gyro, compass, barometer
—
Two-way satellite communication (China model only)
Our Tests 2 specs
Loudspeaker
—
-24.1 LUFS (Very good)
Battery
—
Active use score 16:13h
Similar Comparisons
Common Questions
Which phone is the best in this comparison?
Xiaomi 15 Ultra has the bigger display.
How are the comparison winners decided?
We compare measurable specs (display size, battery capacity, RAM, charging, weight) and price (USD). When two phones tie or data is missing we mark the category "Depends".
Which is more affordable?
The cheaper option is shown as the value winner above. Prices are USD and may vary by region or retailer.