WP SDK v 7.1.1
Allegedly AKA “Tango”

For lower spec devices
Like the Lumia 610

2 big differences
All about resources
256MB

Get the SDK
http://go.microsoft.com/fwlink/?LinkId=242824

Install the SDK
Remember it’s a CTP

What’s installed
Not a lot...

NOT a new OS

a new emulator

Detect low memory devices
public bool Is256MbDevice()
{
// Place call in a try block in case the user is not
// running the most recent version of the Windows Phone OS
// and this method call is not supported.
try
{
var result = (long)DeviceExtendedProperties
.GetValue("ApplicationWorkingSetLimit");
return result < 94371840L;
}
catch (ArgumentOutOfRangeException)
{
// The device has not received the OS update,
// which means the device is a 512-MB device.
return false;
}
}

Detect low memory devices
if (Environment.OSVersion.Version.Build >= 8731)
{
var result = (long)DeviceExtendedProperties
.GetValue("ApplicationWorkingSetLimit");
return result < 94371840L;
}
else
{
return false;
}

Only detect available memory
once
Save the results
(IsolatedStorageSettings)

Test
In emulatorS, for now

No generic background
agents
Resource-intensive or periodic

Resource-intensive agent
alternative
Do it when the app is running

Periodic task agent
alternative
Push Notifications

Save memory
Do less

Save memory
Fewer, smaller resources

Save memory
Apps, not controls

beware
Long lists, complex templates
and animations, orientation
changes

Opting out
They won’t even know you exist

Opting out
<?xml version="1.0" encoding="utf-8"?>
<Deployment xmlns="http://schemas.microsoft.com/windowsphone/2009/d...
<App xmlns="" ProductID="{b0cd6a33-0fde-43f0-ace3-86df62da
<IconPath IsRelative="true" IsResource="false">ApplicationIcon.png</IconPath>
<Capabilities>
<Capability Name="ID_CAP_NETWORKING"/>
...
</Capabilities>
<Requirements>
<Requirement Name="ID_REQ_MEMORY_90" />
</Requirements>
...

Uninstall the SDK
emulator, then assemblies

Worth doing?
Bahrain, Bulgaria, China, Costa
Rica, Croatia, Estonia, Iceland, Iraq, Israel, Ka
zakhstan, Latvia, Lithuania, Qatar, Romania,
Saudi
Arabia, Slovakia, Slovenia, Thailand, Turkey,
UAE, Ukraine, Venezuela and Vietnam