Compare phone specifications and find the best device for your needs.

Explore

Latest Phones
Trending
Phone Finder
Glossary
Browse All Brands

Top Brands

Samsung
Apple
Xiaomi
Google

HalabTech

Main Site
Support
Server
Legal Center
Terms of Use
Privacy Policy
DMCA
Third-Party Content
Contact

© 2026 HalabTech Specs.All rights reserved.

Latest Blog Phone Finder Server Firmware

Search phones...

Bird M01 vs Bird S661: Which is better? | HalabTech Specs

HomeCompare

M01 vs S661

Quick verdict

Which is better?

S661 leads the measured specs 2-1.

Measured wins

M01: 1S661: 2Ties: 6

Choose M01 for

Weight

Choose S661 for

Thickness
Battery

Biggest differences

ThicknessS661

18.2 mmvs15.8 mm+15%

BatteryS661

650 mAhvs700 mAh+7.1%

WeightM01

75 gvs80 g+6.7%

M01

M01

Bird

S661

S661

Bird

Head-to-head comparison

M01

1

spec wins

Ties

6

equal specs

S661

2

spec wins

Overall winner

Display

Screen size

equal specs

M011.5"

S6611.5"

Specifications Comparison

Network

Technology

M01

GSM

S661

GSM

2G bands

M01

GSM 900 / 1800

S661

GSM 900 / 1800

GPRS

M01

No

S661

No

EDGE

M01

No

S661

No

Resolution

equal specs

M01128 × 128 px

S661128 × 128 px

Refresh rate

M01—

S661—

Peak brightness

M01—

S661—

Pixel density

equal specs

M01121 ppi

S661121 ppi

Performance

CPU speed

M01—

S661—

RAM

M01—

S661—

Storage

M01—

S661—

Cameras

Main camera

M01—

S661—

Front camera

M01—

S661—

Battery

Battery

M01650 mAh

S661Winner: 700 mAh+7.1%

Wired charging

M01—

S661—

Build

Weight

M01Winner: 75 g+6.7%

S66180 g

Thickness

M0118.2 mm

S661Winner: 15.8 mm+15%

IP rating

M01—

S661—

Connectivity

Wi‑Fi

M01No

S661No

Bluetooth

M01No

S661No

USB

M01Proprietary

S661No

5G support

equal specs

M01No

S661No

NFC

M01—

S661—

3.5mm jack

equal specs

M01No

S661No

SD card

equal specs

M01No

S661No

Stereo speakers

M01—

S661—

M01SpecS661

Display

1.5"

Screen sizeequal specs

1.5"

128 × 128 px

Resolutionequal specs

128 × 128 px

—

Refresh rate

—

—

Peak brightness

—

121 ppi

Pixel densityequal specs

121 ppi

Performance

—

CPU speed

—

—

RAM

—

—

Storage

—

Cameras

—

Main camera

—

—

Front camera

—

Battery

650 mAh

Battery

Winner: 700 mAh+7.1%

—

Wired charging

—

Build

Winner: 75 g+6.7%

Weight

80 g

18.2 mm

Thickness

Winner: 15.8 mm+15%

—

IP rating

—

Connectivity

No

Wi‑Fi

No

No

Bluetooth

No

Proprietary

USB

No

No

5G supportequal specs

GSMTechnologyGSM

GSM 900 / 1800 2G bandsGSM 900 / 1800

NoGPRSNo

NoEDGENo

Launch

Announced

M01

2007

S661

2007

Status

M01

Discontinued

S661

Discontinued

2007Announced2007

DiscontinuedStatusDiscontinued

Body

Dimensions

M01

89.5 x 44 x 18.2 mm (3.52 x 1.73 x 0.72 in)

S661

105.3 x 44 x 15.8 mm (4.15 x 1.73 x 0.62 in)

Weight

M01

75 g (2.65 oz)

S661

80 g (2.82 oz)

SIM

M01

Mini-SIM

S661

Mini-SIM

89.5 x 44 x 18.2 mm (3.52 x 1.73 x 0.72 in)Dimensions105.3 x 44 x 15.8 mm (4.15 x 1.73 x 0.62 in)

75 g (2.65 oz)Weight80 g (2.82 oz)

Mini-SIMSIMMini-SIM

Display

Type

M01

OLED, 260K colors

S661

CSTN, 65K colors

Size

M01

1.5 inches, 7.3 cm2 (~18.4% screen-to-body ratio)

S661

1.5 inches, 7.3 cm2 (~15.7% screen-to-body ratio)

Resolution

M01

128 x 128 pixels, 1:1 ratio (~121 ppi density)

S661

128 x 128 pixels, 1:1 ratio (~121 ppi density)

OLED, 260K colorsTypeCSTN, 65K colors

1.5 inches, 7.3 cm2 (~18.4% screen-to-body ratio)Size1.5 inches, 7.3 cm2 (~15.7% screen-to-body ratio)

128 x 128 pixels, 1:1 ratio (~121 ppi density)Resolution128 x 128 pixels, 1:1 ratio (~121 ppi density)

Memory

Card slot

M01

No

S661

No

Phonebook

M01

Yes

S661

Yes

Call records

M01

20 dialed, 20 received, 20 missed calls

S661

20 dialed, 20 received, 20 missed calls

Internal

M01

62MB

S661

-

NoCard slotNo

YesPhonebookYes

20 dialed, 20 received, 20 missed callsCall records20 dialed, 20 received, 20 missed calls

62MBInternal-

Camera

Other

M01

No

S661

No

NoOtherNo

Sound

Loudspeaker

M01

Yes

S661

No

Alert types

M01

Vibration; Downloadable polyphonic, MP3 ringtones

S661

Vibration; Downloadable polyphonic, MIDI ringtones

3.5mm jack

M01

No

S661

No

YesLoudspeakerNo

Vibration; Downloadable polyphonic, MP3 ringtonesAlert typesVibration; Downloadable polyphonic, MIDI ringtones

No3.5mm jackNo

Comms

WLAN

M01

No

S661

No

Bluetooth

M01

No

S661

No

Positioning

M01

No

S661

No

Radio

M01

No

S661

No

USB

M01

Proprietary

S661

No

NoWLANNo

NoBluetoothNo

NoPositioningNo

NoRadioNo

ProprietaryUSBNo

Features

Sensors

M01

S661

Messaging

M01

SMS

S661

SMS

Browser

M01

No

S661

No

Games

M01

Yes

S661

Yes

Java

M01

No

S661

No

Other

M01

MP3 Player Audio Recorder FR,HR,EFR,AMR voice codecs Languages: Chinese, English, French, Spanish, Portuguese

S661

FR,HR,EFR voice codecs Languages: Chinese, English, French, Arabic

Sensors

SMSMessagingSMS

NoBrowserNo

YesGamesYes

NoJavaNo

MP3 Player Audio Recorder FR,HR,EFR,AMR voice codecs Languages: Chinese, English, French, Spanish, PortugueseOtherFR,HR,EFR voice codecs Languages: Chinese, English, French, Arabic

Battery

Type

M01

Removable Li-Ion 650 mAh battery

S661

Removable Li-Ion 700 mAh battery

Stand-by

M01

Up to 140 h

S661

Up to 140 h

Talk time

M01

Up to 4 h

S661

Up to 3 h

Removable Li-Ion 650 mAh batteryTypeRemovable Li-Ion 700 mAh battery

Up to 140 hStand-byUp to 140 h

Up to 4 hTalk timeUp to 3 h

Misc

Colors

M01

Black, White

S661

Black, Pink

Black, WhiteColorsBlack, Pink

No

—

NFC

—

No

3.5mm jackequal specs

No

No

SD cardequal specs

No

—

Stereo speakers

—