GeekRadar / Il banco di confronto
CONFRONTA.
Non classificati
Unspecified

Micromax A28 Bolt

Non classificati

Processore
1.0 GHz Cortex-A5*
Diagonale schermo
3,50 in*
Capacità batteria
1.500 mAh*

Display

Diagonale schermo
3,50 in*

Elaborazione e piattaforma

Processore
1.0 GHz Cortex-A5*
Grafica
Mali-300*

Memoria e archiviazione

Opzioni archiviazione
512MB 256MB RAM*

Configurazioni memoria

  • 256 MB RAM / 512 MB storage*
    Memoria RAM
    256 MB*
    Capacità
    512 MB*

Opzioni memoria

  • 256 MB*
    Capacità
    256 MB*
  • 0.25 GB*
    Capacità
    0,25 GB*

Opzioni archiviazione

  • 512 MB*
    Capacità
    512 MB*

Specifiche di potenza

Capacità batteria
1.500 mAh*

Connettività e software

Sistema operativo
Android 2.3 (Gingerbread)*
Reti cellulari
GSM*
Wi-Fi
Valore riportato 1: Wi-Fi 802.11 b/g/n*
Valore riportato 2: WLANWi-Fi 802.11 b/g/n*
Valore riportato 3: Wi-Fi 802.11 b/g/n*
Bluetooth
Valore riportato 1: 2.1, A2DP*
Valore riportato 2: 2,10*
Valore riportato 3: 2.1, A2DP*
Valore riportato 4: 2.1, A2DP*
NFC
No*

Design e dimensioni

Dimensioni
116.9 x 62.5 x 12.5 mm (4.60 x 2.46 x 0.49 in)*
Peso
89 g*

Configurazione di sistema

Specifiche dettagliate

Specifiche 1 · 26 campi
Body Weight
89 g (3.14 oz)*
Ambito e condizioni
explicit_quantities
  • value
    89*
    unit
    g*
    original
    89 g*
    span
    • 0*
    • 4*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Body SIM
Dual SIM (Mini-SIM)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Display Type
3.5 inches, 36.5 cm*
Ambito e condizioni
explicit_quantities
  • value
    3,5*
    unit
    inches*
    original
    3.5 inches*
    span
    • 0*
    • 10*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    36,5*
    unit
    cm*
    original
    36.5 cm*
    span
    • 12*
    • 19*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Display Resolution
320 x 480 pixels, 3:2 ratio (~165 ppi density)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
  • x
    320*
    y
    480*
    unit
    px*
    original
    320 x 480*
    span
    • 0*
    • 9*
    role
    Declared source matrix; native photosite count and active physical area unverified.*
Platform OS
Android 2.3 (Gingerbread)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Platform Cpu
1.0 GHz Cortex-A5*
Ambito e condizioni
explicit_quantities
  • value
    1*
    unit
    GHz*
    original
    1.0 GHz*
    span
    • 0*
    • 7*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Platform Gpu
Mali-300*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Memory Cardslot
microSDHC (dedicated slot)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Name
Micromax A28 Bolt*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Memory Internalmemory
512MB 256MB RAM*
Ambito e condizioni
explicit_quantities
  • value
    512*
    unit
    MB*
    original
    512MB*
    span
    • 0*
    • 5*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    256*
    unit
    MB*
    original
    256MB*
    span
    • 6*
    • 11*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
MainCamera Cameraspecs
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
MainCamera Video
320p*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
SelfieCamera Cameraspecs
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Sound Feature
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Sound 3.5mmjack
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
COMMS WLAN
WLANWi-Fi 802.11 b/g/n*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
COMMS Bluetooth
2.1, A2DP*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
COMMS NFC
No*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
COMMS Radio
FM radio, recording*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
COMMS USB
microUSB*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Battery Type
Li-Ion 1500 mAh, removable*
Ambito e condizioni
explicit_quantities
  • value
    1.500*
    unit
    mAh*
    original
    1500 mAh*
    span
    • 7*
    • 15*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Colors
Black*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Price
About 40 EUR*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Network Technology
GSM*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Network 2gbands
GSM 900 / 1800 - SIM 1 & SIM 2*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Body Dimensions
116.9 x 62.5 x 12.5 mm (4.60 x 2.46 x 0.49 in)*
Ambito e condizioni
explicit_quantities
  • value
    12,5*
    unit
    mm*
    original
    12.5 mm*
    span
    • 15*
    • 22*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    0,49*
    unit
    in*
    original
    0.49 in*
    span
    • 38*
    • 45*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Specifiche 2 · 1 campi
model
A28 Bolt*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Specifiche 3 · 68 campi
body weight
89 g (3.14 oz)*
Ambito e condizioni
explicit_quantities
  • value
    89*
    unit
    g*
    original
    89 g*
    span
    • 0*
    • 4*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
body weight
89 g (3.14 oz)*
Ambito e condizioni
explicit_quantities
  • value
    89*
    unit
    g*
    original
    89 g*
    span
    • 0*
    • 4*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
body sim
Dual SIM (Mini-SIM)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
body sim
Dual SIM (Mini-SIM)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
display type
TFT capacitive touchscreen, 65K colors*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
display type
TFT capacitive touchscreen, 65K colors*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
display size
3.5 inches, 36.5 cm (~49.9% screen-to-body ratio)*
Ambito e condizioni
explicit_quantities
  • value
    3,5*
    unit
    inches*
    original
    3.5 inches*
    span
    • 0*
    • 10*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    36,5*
    unit
    cm*
    original
    36.5 cm*
    span
    • 12*
    • 19*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
display size
3.5 inches, 36.5 cm (~49.9% screen-to-body ratio)*
Ambito e condizioni
explicit_quantities
  • value
    3,5*
    unit
    inches*
    original
    3.5 inches*
    span
    • 0*
    • 10*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    36,5*
    unit
    cm*
    original
    36.5 cm*
    span
    • 12*
    • 19*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
display resolution
320 x 480 pixels, 3:2 ratio (~165 ppi density)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
  • x
    320*
    y
    480*
    unit
    px*
    original
    320 x 480*
    span
    • 0*
    • 9*
    role
    Declared source matrix; native photosite count and active physical area unverified.*
display resolution
320 x 480 pixels, 3:2 ratio (~165 ppi density)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
  • x
    320*
    y
    480*
    unit
    px*
    original
    320 x 480*
    span
    • 0*
    • 9*
    role
    Declared source matrix; native photosite count and active physical area unverified.*
memory card slot
microSDHC (dedicated slot)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
memory card slot
microSDHC (dedicated slot)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
sound loudspeaker
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
sound loudspeaker
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
model
A28 Bolt*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
model
A28 Bolt*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
sound 3.5mm jack
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
sound 3.5mm jack
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms wlan
Wi-Fi 802.11 b/g/n*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms wlan
Wi-Fi 802.11 b/g/n*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms bluetooth
2.1, A2DP*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms bluetooth
2.1, A2DP*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms gps
No*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms gps
No*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms radio
FM radio, recording*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms radio
FM radio, recording*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms usb
microUSB*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
comms usb
microUSB*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
features sensors
V1*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
features sensors
V1*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network technology
GSM*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network technology
GSM*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
misc colors
Black*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
misc colors
Black*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform os
Android 2.3 (Gingerbread)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform os
Android 2.3 (Gingerbread)*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network 2g bands
GSM 900 / 1800 - SIM 1 & SIM 2*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network 2g bands
GSM 900 / 1800 - SIM 1 & SIM 2*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform cpu
1.0 GHz Cortex-A5*
Ambito e condizioni
explicit_quantities
  • value
    1*
    unit
    GHz*
    original
    1.0 GHz*
    span
    • 0*
    • 7*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform cpu
1.0 GHz Cortex-A5*
Ambito e condizioni
explicit_quantities
  • value
    1*
    unit
    GHz*
    original
    1.0 GHz*
    span
    • 0*
    • 7*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform gpu
Mali-300*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
platform gpu
Mali-300*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
memory internal
512MB 256MB RAM*
Ambito e condizioni
explicit_quantities
  • value
    512*
    unit
    MB*
    original
    512MB*
    span
    • 0*
    • 5*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    256*
    unit
    MB*
    original
    256MB*
    span
    • 6*
    • 11*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
memory internal
512MB 256MB RAM*
Ambito e condizioni
explicit_quantities
  • value
    512*
    unit
    MB*
    original
    512MB*
    span
    • 0*
    • 5*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    256*
    unit
    MB*
    original
    256MB*
    span
    • 6*
    • 11*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
main camera single
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
main camera single
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
main camera video
320p*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
main camera video
320p*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
misc price
About 40 EUR*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
misc price
About 40 EUR*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network gprs
Class 12*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network gprs
Class 12*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network edge
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
network edge
Sì*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
selfie camera single
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
selfie camera single
VGA*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
launch announced
2014. Released 2014*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
launch announced
2014. Released 2014*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery
Removable Li-Ion 1500 mAh battery*
Ambito e condizioni
explicit_quantities
  • value
    1.500*
    unit
    mAh*
    original
    1500 mAh*
    span
    • 17*
    • 25*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery
Removable Li-Ion 1500 mAh battery*
Ambito e condizioni
explicit_quantities
  • value
    1.500*
    unit
    mAh*
    original
    1500 mAh*
    span
    • 17*
    • 25*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
launch status
Discontinued*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
launch status
Discontinued*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery talk time
Up to 4 h*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery talk time
Up to 4 h*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery stand.by
Up to 260 h*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
battery stand.by
Up to 260 h*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
body dimensions
116.9 x 62.5 x 12.5 mm (4.60 x 2.46 x 0.49 in)*
Ambito e condizioni
explicit_quantities
  • value
    12,5*
    unit
    mm*
    original
    12.5 mm*
    span
    • 15*
    • 22*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    0,49*
    unit
    in*
    original
    0.49 in*
    span
    • 38*
    • 45*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
body dimensions
116.9 x 62.5 x 12.5 mm (4.60 x 2.46 x 0.49 in)*
Ambito e condizioni
explicit_quantities
  • value
    12,5*
    unit
    mm*
    original
    12.5 mm*
    span
    • 15*
    • 22*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
  • value
    0,49*
    unit
    in*
    original
    0.49 in*
    span
    • 38*
    • 45*
    scope
    Explicit token only; no native/binned, sustained/peak or installed-variant role inferred.*
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Specifiche 4 · 16 campi
Body Weight (g)
89* g
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Display Type
TFT, 65K colors*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Pixels X
320*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Pixels Y
480*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Display Size (inches)
3,5* inches
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Screen to Body Ratio (%)
49,9* %
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
RAM (GB)
0,25* GB
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Sound 3.5mm jack
1*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Comms Bluetooth
2,1*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Battery Capacity (mAh)
1.500* mAh
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Price in USD
53.2*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Model
Micromax A28 Bolt*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Launch Expected Year
2014.0*
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Height (mm)
116,9* mm
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Width (mm)
62,5* mm
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices
Thickness (mm)
12,5* mm
Ambito e condizioni
explicit_quantities
aperture_declarations
optical_format_declarations
declared_pixel_matrices

* Dati provvisori