Celkon A355 vs HTC U Ultra

Compare recorded specifications, size and practical differences.

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

  • Weight

    A355: 72.5 g lighter

    A355:
    97.5 g
    U Ultra:
    170 g
  • Width

    A355: 16.5 mm narrower

    A355:
    63.3 mm
    U Ultra:
    79.8 mm
  • Screen diagonal

    A355: 2.2 in smaller diagonal

    A355:
    3.5 in
    U Ultra:
    5.7 in
  • Chipset

    A355:
    Spreadtrum 7715
    U Ultra:
    Qualcomm MSM8996 Snapdragon 821 (14 nm)
  • Depth

    U Ultra: 2.2 mm thinner

    A355:
    10.2 mm
    U Ultra:
    8 mm
  • Height

    A355: 47.1 mm shorter

    A355:
    115.3 mm
    U Ultra:
    162.4 mm

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

  1. 1. A355

    Height:
    115.3 mm
    Width:
    63.3 mm
    Depth:
    10.2 mm +2.2 mm versus U Ultra
  2. 2. U Ultra

    Height:
    162.4 mm +47.1 mm versus A355
    Width:
    79.8 mm +16.5 mm versus A355
    Depth:
    8 mm

Weight

Bars start at zero and share a scale within this chart.

  1. 1. A355

    97.5 g

  2. 2. U Ultra

    170 g

    +72.5 g versus A355

Screen size

Approximate rectangular screens calculated from recorded diagonal and aspect ratio at one relative scale. Rounded corners and cutouts are not subtracted. These are not phone outlines or calibrated actual sizes.

  1. 1. A355

    Screen diagonal:
    3.5 in
    Aspect ratio (height:width):
    3:2
    Approximate rectangular screen area:
    36.5 cm²
  2. 2. U Ultra

    Screen diagonal:
    5.7 in
    Aspect ratio (height:width):
    16:9
    Approximate rectangular screen area:
    89.6 cm²

U Ultra has approximately 145.5% more rectangular screen area than A355.

Memory variants

Each row compares the same storage capacity. Cells show recorded RAM alternatives, not combined maxima. Not recorded does not mean unavailable in every market.

No unambiguous storage/RAM pairings are recorded. See the original specifications below.

A355: Original memory entry

512 MB · 256 MB RAM

U Ultra: Original memory entry

64/128 GB · 512GB 4GB

Practical features

Explicit Yes and No values are shown directly. Qualified or regional records retain their details. Unknown means the record is missing.

1. A355

NFC:
Unknown
Headphone jack:
Yes
Memory card support:
See details microSD · up to 32 GB

2. U Ultra

NFC:
Yes
Headphone jack:
No
Memory card support:
See details microSD · up to 512 GB (uses SIM 2 slot)

Battery capacity

Capacity is not battery life. No endurance test is implied.

Recorded battery capacity

Bars start at zero and share a scale within this chart.

  1. 1. A355

    1200 mAh

  2. 2. U Ultra

    3000 mAh

    +1800 mAh versus A355

Specifications

Open a section for more detail. On narrow screens, swipe sideways or use Left/Right arrow keys while the table is focused. Unknown means missing data, not No. Recorded zero values are shown as recorded.

1. A3552. U Ultra

Everyday essentials
Everyday essentials — specifications for A355, U Ultra.
SpecificationA355U Ultra
Dimensions (HxWxD)
  • 115.3 Х 63.3 Х 10.2 mm
  • 162.4 Х 79.8 Х 8 mm
Weight
  • 97.5 g
  • 170 g
Technology Unknown
  • Super LCD5
Screen size
  • 3.5" inch
  • 5.7" inch
Screen resolution
  • 320 x 480 px
  • 1440 x 2560 px
Internal memory Recorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.
  • 512 MB
  • 256 MB RAM
  • 64/128 GB
  • 512GB 4GB
Memory card support
  • microSD
  • up to 32 GB
  • microSD
  • up to 512 GB (uses SIM 2 slot)
Battery Capacity is not battery life. No endurance test is implied.
  • 1200 mAh
  • Li-Ion
  • 3000 mAh
  • Non-removable Li-Ion
Operating system OS
  • Android 4.4.2 (KitKat)
  • Android 7.0 (Nougat)
  • upgradable to Android 8.0 (Oreo)
Chipset
  • Spreadtrum 7715
  • Qualcomm MSM8996 Snapdragon 821 (14 nm)
NFC Unknown
  • Yes
Headphone jack
  • Yes
  • No
Display
Display — specifications for A355, U Ultra.
SpecificationA355U Ultra
Touchscreen
  • capacitive touchscreen
  • capacitive touchscreen
Display colors Unknown
  • 16M
Screen area
  • 36.5 cm2
  • 90.3 cm2
Screen format
  • 3:2 (height:width)
  • 16:9 (height:width)
Screen to body ratio
  • 50.0%
  • 69.7%
PPI /points per inch/
  • 165 PPI
  • 513 PPI
Screen protection Unknown
  • Corning Gorilla Glass 5 (64 GB version)Sapphire crystal glass (128 GB version)
Camera and Video
Camera and Video — specifications for A355, U Ultra.
SpecificationA355U Ultra
Rear camera, main
  • 2 MP
  • Single
  • 12 MP
  • Single
Camera specs
  • 2 MP
  • 12 MP
  • f/1.8
  • 26mm (wide)
  • 1/2.3''
  • 1.55µm
  • OIS
  • PDAF & laser AF
Functions
  • Dual-LED flash
  • Auto-HDR
Video
  • Yes
  • 1080p@30fps
Front camera, selfie
  • 0.3 MP
  • Single
  • 16 MP
  • Single
Specifications
  • VGA
  • 16 MP
Performance

Scores marked * are historical catalogue entries. Test conditions are unspecified; no new testing is implied.

Performance — specifications for A355, U Ultra.
SpecificationA355U Ultra
Processor CPU
  • 1.0 GHz
  • Quad-core (2x2.15 GHz Kryo & 2x1.6 GHz Kryo)
Graphics processor GPU
  • Mali-400
  • Adreno 530
Antutu 7 score * Unknown
  • 168385
GeekBench 4 Single Core * Unknown
  • 1662
GeekBench 4 Multi-Core * Unknown
  • 3920
GeekBench 4 RenderScript * Unknown
  • 7174
GeekBench 5 Single Core * Unknown
  • 302
GeekBench 5 Multi-Core * Unknown
  • 795
General specs
General specs — specifications for A355, U Ultra.
SpecificationA355U Ultra
Release date
  • 2015
  • May
  • 2017
  • January
Colors
  • Light Blue
  • Dart Blue
  • Red
  • Yellow
  • White
  • Brilliant Black
  • Cosmetic Pink
  • Ice White
  • Sapphire Blue
Historical recorded price Legacy catalogue value; date unknown. Not a current offer. Unknown
  • 250 EUR
Battery life Unknown
  • Stand by time- Up to 312 h (3G) Talking time- Up to 26 h (3G)
Body build Unknown
  • Front/back glass
  • aluminum frame
Communication and Connectivity
Communication and Connectivity — specifications for A355, U Ultra.
SpecificationA355U Ultra
SIM card
  • Dual SIM
  • Hybrid Dual SIM (Nano-SIM
  • dual stand-by)
Network
  • Show all network frequencies: -2G - GSM 900 / 1800 - SIM 1 & SIM 2
  • Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100)
  • 2(1900)
  • 3(1800)
  • 4(1700/2100)
  • 5(850)
  • 7(2600)
  • 8(900)
  • 12(700)
  • 17(700)
  • 20(800)
  • 28(700)
  • 38(2600)
  • 39(1900)
  • 40(2300)
  • 41(2500)
Speed
  • HSPA
  • HSPA 42.2/5.76 Mbps
  • LTE-A (3CA) Cat11 600/50 Mbps
GPRS
  • Yes
  • Yes
Edge
  • Yes
  • Yes
Wi-Fi
  • Wi-Fi 802.11 b/g/n
  • Wi-Fi 802.11 a/b/g/n/ac
  • dual-band
  • WiFi Direct
  • DLNA
  • hotspot
GPS
  • Yes
  • Yes
  • with A-GPS
  • GLONASS
  • BDS
USB
  • microUSB
  • 3.1
  • Type-C 1.0 reversible connector
Bluetooth
  • 2.0
  • 4.2
  • A2DP
  • LE
Harmful irradiation
  • SAR EU - 0.49 W/kg (head) 0.84 W/kg (body)
Unknown
Music and Audio
Music and Audio — specifications for A355, U Ultra.
SpecificationA355U Ultra
Radio
  • FM radio
  • No
Others Unknown
  • Secondary display
  • 160 x 1040 pixels
  • 2 inches
  • 24-bit/192kHz audio -Active noise cancellation with dedicated mic
Other features
Other features — specifications for A355, U Ultra.
SpecificationA355U Ultra
Dop
  • Sensors Accelerometer
  • Sensors Fingerprint (front-mounted)
  • accelerometer
  • gyro
  • proximity
  • compass - Fast battery charging (Quick Charge 3.0) - Also known as HTC Ocean Note