Microsoft’s OEM dev site continues to be a rich vein of information to mine regarding the next minor version of Windows Phone 8.1, GDR1.
The latest to arrive is the Chassis Requirements for handsets running the OS. Most of the features remain unchanged from earlier versions of the OS, but there are a few surprises.
One of them is that Windows Phone now supports qHD resolution (960 x 540) scaled from 720P. The OS still does not support the newer super high resolutions however, being limited to Full HD (1080p)
Also interesting is that a proximity sensor is now a hard requirement, surprising given that the Nokia Lumia 630 and 530 does not feature one.
Also unfortunate is that there does not appear to be any support yet for the newer Snapdragon 810 processors.
Microsoft has dropped performance requirements for MicroSD cards in WP8.1, and can compress the OS partition to enable more free space in 4 GB handsets.
Applications processor
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Phones designed for Windows Phone 8.1:
Qualcomm MSM8x10, MSM8x12, MSM8x26, MSM8926, MSM8x28, MSM8928, MSM8974 or MSM8974Pro Phones updateable to Windows Phone 8.1: Qualcomm MSM8260A, MSM8660A, MSM8960, MSM8230, MSM8630, MSM8930AA, MSM8930AB, MSM8227 or MSM8627 |
RAM
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LPDDR2 or LPDDR3
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Memory
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Flash user partition
e MMC |
Power
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Monitor gauge Required
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Display Resolution
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WVGA, FWVGA, WXGA, qHD, 720p (HD), or 1080p (FHD)
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Bit depth
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16 bits of color per pixel minimum
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Touch support
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True multi-touch
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Camera
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Rear-facing camera Required
Forward-facing camera Optional
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Audio
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Primary microphone Required
Secondary microphone Optional
Dynamic noise suppression Optional
Loudspeaker Required
Earpiece Required
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Wireless
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2/2.5G cellular radio Required
3G/4G cellular radio Required
Bluetooth Required
Wi-Fi
802.11b/g 802.11a/n
FM radio Optional
NFC Optional
A-GNSS Required
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Sensors
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Accelerometer Required
Magnetometer Optional
Ambient light sensor Optional
Proximity sensor Required
Gyroscope Optional
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Notifications
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Vibration mechanism Required
NLED Optional
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Controls
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Start Required
Back Required
Search Required
Power Required
Volume Up Required
Volume Down Required
Camera button Optional
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Connectors
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Micro-USB 2.0 or 3.0 Required
Headphone/headset jack
3.5-mm stereo headset jack with 3-button detection support
Micro SD card slot Optional
One SIM slot if the phone supports a single SIM card.
Two SIM slots if the phone supports dual SIM.
Video out NA
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In-box cables & accessories
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USB sync cable Optional
Power adapter Optional
Headset Optional
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