Microsoft Lumia 638 vs boltt Evo 4G

Comparing the Microsoft Lumia 638 vs boltt Evo 4G across performance, display, camera, battery and storage to help determine the better smartphone.

Here is the summary of the results:

Performance: boltt Evo 4G runs at a higher processing speed of 1.8 GHz, while Microsoft Lumia 638 runs at 1.2 GHz, making boltt Evo 4G the better performer.

Display: boltt Evo 4G offers a screen size of 6.8 inches, while Microsoft Lumia 638 offers 4.5 inches, making boltt Evo 4G the larger display of the two. Microsoft Lumia 638 features a IPS LCD display compared to boltt Evo 4G's LCD, making Microsoft Lumia 638 the better display of the two.

Rear Camera: boltt Evo 4G offers a higher rear camera resolution with 50 MP, while Microsoft Lumia 638 offers 5 MP, making boltt Evo 4G better for rear camera photography.

Battery: boltt Evo 4G offers a higher battery capacity with 6000 mAh, while Microsoft Lumia 638 offers 1830 mAh, making boltt Evo 4G better for longer battery life.

Storage: Microsoft Lumia 638 offers higher internal storage with 8 GB, while boltt Evo 4G offers 64 GB, making Microsoft Lumia 638 the better option for storage.

Microsoft Lumia 638

₹11,990

(Discontinued)

boltt Evo 4G

₹8,999

@ Flipkart

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Show Only Differences

Summary

Spec Score

N/A

74%

Release Date

18 Dec, 2014

27 Aug, 2026

Performance

N/A
Snapdragon 400	Unisoc T7250
(upto 1.2 GHz)	Octa Core (upto 1.8 GHz)
1 GB RAM	4 GB RAM

Display

N/A
4.5 inches (11.43 cm)	6.8 inches (17.27 cm)
IPS LCD	LCD
480x854 px	720x1570 px (HD+)
N/A	120 Hz Refresh Rate

Rear Camera

N/A
5 MP Primary Camera	50 MP Primary Camera

Front Camera

N/A
N/A	8 MP

Battery

N/A
1830 mAh	6000 mAh
N/A	18W Fast Charging
N/A	No Wireless Charging

Storage

8 GB	64 GB
N/A	eMMC 5.1

Expert Review

N/A	7.8/10 Read Expert Review

Pros

Device yet to be reviewed

Fluid, high refresh rate display
Clean, near-stock Android
Reliable battery life
Decent selfie camera

Cons

Device yet to be reviewed

Average rear cameras
Noticeably heavy build

User Ratings

4/5

(603 ratings)

N/A

Benchmarks (The higher, the better)

N/A	495,830 AnTuTu Score

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₹8,999

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User Feedback

General

Launch Date

N/A	Aug 25, 2026 (Official)

Operating System

Windows Phone v8.1

Android v16

OS Updates

N/A

1 Year

Security Updates

N/A

2 Year

Performance

Performance Rating

N/A

Good

Chipset

Qualcomm Snapdragon 400 MSM8926

Unisoc T7250

View Details

Processor

Quad core, 1.2 GHz, Cortex A7

Octa core

1.8 GHz, Dual core, Cortex A75 1.6 GHz, Hexa Core, Cortex A55

Architecture (The higher, the better)

N/A

64 bit

Fabrication (The lower, the better)

N/A

6 nm

Graphics (GPU)

Adreno 305

Mali-G57

RAM

1 GB	4 GB / 6 GB

RAM Type

N/A

LPDDR4X

Performance Test Results

AnTuTu Score (The higher, the better) AnTuTu benchmark measures overall performance of a phone by stress-testing CPU, GPU, RAM, etc.

N/A

495,830

Bootup Time (The lower, the better)

N/A

25.0 s

Display

Display Rating

N/A

Very Good

Display Type

IPS LCD

LCD

Screen Size

4.5 inches (11.43 cm)

6.8 inches (17.27 cm)

Resolution

480x854 px

720x1570 px (HD+)

Peak Brightness

N/A

600 nits

HBM Brightness

N/A

900 nits

Refresh Rate

N/A

120 Hz

Pixel Density

218 ppi

254 ppi

Touch Sampling Rate

N/A

240 Hz

Screen to Body Ratio (calculated)

64.59 %

86.97 %

Aspect Ratio

N/A

19.6:9

Screen Protection

N/A

Yes

Bezel-less Display

N/A	Yes with punch-hole display

HDR 10 / HDR+ Support

N/A

Yes

Screen to Body Ratio (claimed by the brand)

N/A

90.4 %

Design

Height

129.5 mm

166.48 mm

Width

66.7 mm

78.23 mm

Thickness

9.2 mm

8.78 mm

Weight

134 grams

219 grams

Build Material

N/A	Back: Polycarbonate

Water Resistance

N/A	Yes IP6X IP64

Ruggedness

N/A	Dust proof Shock proof

Rear Camera

Rear Camera Rating

N/A

Good

Resolution

5 MP
Primary Camera4x Digital Zoomf/2.428 mm focal length

50 MP
Primary Camera10x Digital Zoomf/1.8

Autofocus

Yes	Yes Phase Detection Autofocus

Flash

N/A	Yes LED Flash

Image Resolution

2592 x 1944 Pixels

N/A

Settings

Exposure compensation ISO control

N/A

Shooting Modes

Macro Mode

N/A

Camera Features

4 x Digital Zoom
Face detection
Touch to focus

10 x Digital Zoom

Video Recording

1280x720 @ 30 fps

Full HD @30 fps
HD @30/120 fps

Video Recording Features

N/A	Slow Motion

Front Camera

Front Camera Rating

N/A

Very Good

Resolution

N/A	8 MP f/2.2 Primary Camera

Autofocus

N/A

Yes

Flash

N/A	Yes Screen flash

Video Recording

N/A	HD @30 fps

Battery

Battery Rating

N/A

Very Good

Capacity

1830 mAh

6000 mAh

Battery Type

Li-ion

N/A

Quick Charging

N/A	Yes 18W Fast Charging

Reverse Charging

N/A

Yes

Storage

Internal Storage

8 GB	64 GB / 128 GB

Storage Type

N/A

eMMC 5.1

Expandable Storage

Yes Up to 128 GB

Yes Up to 1 TB

Network & Connectivity

SIM Slot(s)

Single SIM

Dual SIM

SIM Type

SIM1: Micro

SIM1: Nano SIM2: Nano

Network Support

5G Not Supported 4G

VoLTE

N/A

Yes

SIM 1

4G Bands:

TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) / 1900(band 39)
FD-LTE 1800(band 3) / 2600(band 7)

4G Bands:

TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41)
FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 700(band 28) / 850(band 5)

4G Speed:

50 Mbit/s ↑ 150 Mbit/s ↓ (LTE category 4)

N/A

SIM 2

N/A	4G Bands: TD-LTE 2600(band 38) / 2300(band 40) / 2500(band 41) FD-LTE 2100(band 1) / 1800(band 3) / 900(band 8) / 850(band 5)

Wi-Fi

Yes Wi-Fi 4 (802.11 b/g/n)

Yes Wi-Fi 5 (802.11 a/b/g/n/ac)

Wi-Fi Features

N/A	Mobile Hotspot

Bluetooth

Yes v4.0

Yes v5.2

GPS

Yes with A-GPS Glonass

NFC

N/A

Yes

Multimedia

Stereo Speakers

N/A

Yes

Audio Jack

3.5 mm

3.5 mm, USB Type-C

Sensors

Fingerprint Sensor

N/A

Yes

Fingerprint Sensor Position

N/A

Side

Fingerprint Sensor Type

N/A	Capacitive

Other Sensors

Accelerometer

Light sensor Proximity sensor Accelerometer Compass Gyroscope

Compare Prices

Not Available in any store

₹8,999

@ Flipkart