Just like a computer, your phone uses software to run. By making sure you always have the latest version of this software, you get:

1. performance improvements to things like battery life and applications
2. new and improved functions
3. the latest versions of SFR applications and services
4. bug fixes

Note:  To set your phone to notify you about available updates, select Settings > phone update > Notify me when new updates are found.

Error codes List:
801812C1: A driver for my phone needs to be updated•
C1010007 and 800704C7: The Zune software doesn't recognize my phone, or stops the update in the middle•
801811A5: My computer can't connect to Windows Phone Update•
80181197: Make room on my computer for phone updates
801811A3: There's a problem with the Background Intelligent Transfer Service (BITS)
800705B4, 80180080, and C101002E: The update times out and doesn't complete

Note: If that doesn't help, try restoring your phone to its previous state with the backup that was made during the update process

Use the Zune PC app to download the update.

1. To download and install Zune, or to learn more about Zune, go to www.zune.net. You may need to restart your computer, and you may need to install additional software. (Depending on what you need to install, this may take a while.)
2. Use the compatible data cable to connect your phone to your computer, and open Zune.
3. Wait while Zune checks for available updates.
4. In the Zune software, click Update Now and follow the instructions displayed on your computer
Make sure you keep your phone connected to your computer until you see a notification that the update is complete.

Note: Before starting the update, make sure your phone has enough battery power.

When a software update is available for you to download, we'll let you know. A notice will appear on your phone, telling you to connect your phone to your computer.
If you haven't done so already, install the Zune software (Windows) or Windows Phone 7 Connector (Mac OS) on your computer. You'll need this software to download the phone update.
When you see the notification on your phone, connect your phone to your computer to download the update. See How do I update my phone software? for detailed instructions about downloading and installing updates.

Note: When you install an update, all of your settings, apps, and media files are preserved.

To see which Windows Phone operating system (OS) version is currently installed on your phone, do the following:
1.On Start, flick left to the App list.
2.Tap Settings > About > More info.

You need to have the appropriate sync software and the Zune PC app installed on your PC. To download and install the latest version on your PC, or to learn more about Zune, go to www.zune.net. You may need to restart your computer, and you may need to install additional software.
Operations:
1. Please connect your new phone to your PC, and open Zune.
2. In Zune settings, make sure the folders are the same you used when syncing 
3. In Zune, select the content type in your collection, and sync the content to your new phone.

Note 1: Some files can be protected by digital rights management (DRM) and cannot be played on more than one phone.

Contacts from your old phone
If you have previously had a micro-SIM card, you can also copy your contacts from your micro-SIM card to your new phone.

Contacts and Calendar from an online service
If your contacts and calendar are stored online as part of an online service such as Google Account, Microsoft Exchange, or even Facebook or Twitter, set up that account on your phone and your contacts and calendar entries are imported automatically.

Contacts and calendar from your computer
If you want to transfer your calendar entries as well as your contacts, you need to have all these:
1. Windows Live account
2. Microsoft Outlook on your computer
3. Microsoft Office Outlook Hotmail Connector downloaded and installed on your computer
To download and install Microsoft Office Outlook Hotmail Connector, search for it at www.microsoft.com/download, and follow the displayed instructions. You may need to restart your computer, and you may need to install additional software.

Operations:
1. Use a compatible USB data cable to connect your phone to your PC.
2. Use the appropriate sync software on your PC, such as Nokia Suite, HTC Sync, Samsung Kies, or iTunes to sync your contacts, calendar entries, and to-dos from your old phone to your computer, and set the sync software to sync the items to Outlook.
3.In Outlook, add the Windows Live account to your Outlook using Microsoft Office Outlook Hotmail Connector. You may need to manually configure the settings.
4.Sync the desired content from your Outlook to your Windows Live account. It may take a while before the content is available in your Windows Live account.
If you haven’t already added your Windows Live account to your new phone, to import the content to your new phone, on your phone, select Settings > email+accounts > add an account > Windows Live, and follow the displayed instructions.

Note 1: These instructions may not apply to all phone models and manufacturers.
Note 2: If you don’t already have a Windows Live account, you can create one at www.live.com, or using your phone. For more information, see the user guide of your phone.

Having problems with your Windows phone?
We’ve found it’s possible to fix many phone problems yourself in a few minutes – including phone freezes, application crashes, sound problems and a blank display. To save yourself time, before you contact us for a repair try these quick fixes.

Easy fix 1: restart your phone

Turn your phone off and take the battery out. Wait a few minutes then put the battery in and turn your phone on. If your battery is not removable, press and hold the power button until the phone vibrates and the screen displays the “Goodbye” message.

Easy fix 2: restore the factory settings
We recommend you back up your data and contacts first.
Depending on your phone model, you can restore the factory settings by selecting:
Settings > About and selecting Reset your phone

Easy fix 3: update your phone’s software
You might not be using the most recent software for your phone. It takes about 15 minutes to update.
We recommend you back up your data and contacts first.
1. Select Start on your phone
2. Flick left to the App list and tap Settings > Phone update
3. If an update is available, connect your phone to your computer using a USB cable.
4. On your computer, open Zune and select Settings > Phone > Update
5. To start updating, select Update now

Your phone doesn’t have a micro-SD card slot – it provides 4GB of onboard storage. You may also have SkyDrive cloud storage, which lets you access and share docs and photos virtually anywhere.

To increase your battery life:

1. Switch Bluetooth off when you don’t need it.
2. Use network connections selectively. For example, if the signal strength of the mobile network varies much in your area, your phone must scan for the available network repeatedly. This increases the demand on battery power. If the 3G connection is on in the mobile network settings, your phone searches for the 3G network. To switch off the 3G connection, select Settings > mobile network, and deactivate the 3G connection.
3.The backlight of the display increases the demand on battery power. In the brightness settings, you can lower the display brightness level.
4.Leaving applications running in the background increases the demand on battery power. Close applications you do not use.
5.Switch off the vibrate function of your phone and use the ringtone only.
6.Switch off your phone whenever you don’t plan to answer any calls, for example, while you are sleeping.
If the battery loses the power fast even though there are no features consuming the power, the battery may be wearing out and you need to replace it with a new one.

Yes, here's how:
1. Tap the protected document.
2. In the Need credentials message box, tap Yes to use the user name and password from the specified email account.
The document will open in the appropriate Office Mobile application after your credentials are verified.

Yes. After you get the Office documents onto your computer (either using email, Windows Live SkyDrive, or Microsoft SharePoint), you can pick up where you left off and edit them on your computer using Microsoft Office 2010 or Microsoft Office Web Apps in your web browser.

From your phone, you can save your documents to Windows Live SkyDrive. If your organization uses Microsoft SharePoint, you can open and edit documents on your phone from the SharePoint site, and then save your changes back to the site.

1. On Start, flick left to the App list, and then tap Office .
2. Flick to Locations, tap Phone, and then tap and hold the document that you want to delete.
3. Tap Delete.
4. Tap Delete in the Confirm delete? message box, or press the Back button to cancel

No. Applications in Office Mobile are made for your phone and have a smaller set of features than those in Microsoft Office 2010.

Word Mobile: .doc, .docx, .dot, .dotx, .dotm, .docm .txt, .rtf
Excel Mobile: .xls, .xlsx, .xlt, .xltx, .xlsm, .xltm
PowerPoint Mobile: .ppt, .pptx, .pps, .ppsx, .pptm, .ppsm
OneNote Mobile: .one

•Microsoft Word Mobile
•Microsoft Excel Mobile
•Microsoft PowerPoint Mobile
•Microsoft OneNote Mobile
•Microsoft SharePoint Workspace Mobile

Yes it is. You don't need to download or install anything else. To start using it, on Start, flick left to the App list, and then tap Office. You can start working on your Microsoft Office documents in the Office Hub.

Tip: If you think you'll use Office Mobile a lot, pin it to Start.

You can use Windows Live SkyDrive cloud storage to transfer your files. You need to have a Windows Live account.

If you don’t already have a Windows Live account, you can create one at www.live.com, or using your phone. For more information, see the user guide of your phone.

1.On your PC, go to www.live.com, and sign in to your Windows Live account.
2.In Windows Live, select SkyDrive, and drag and drop the desired files from your PC to SkyDrive.
3.To access your files, on your new phone, select Office > SkyDrive, and follow the displayed instructions.

Accelerometer(G-sensor)，Ambient Light Sensor，Approximity Sensor，Compass.

3.5 mm

IEEE 802.11b/g/n (Compatible)

Bluetooth 2.1 with EDR，A2DP

4.3 inch，800*480 WVGA

No support

For 1400mAh battery, the standby time is 250hours, and the conversation time is 360minutes.

Note: The above data is theoretical value, the actual data depends on the network status.

eMMC ROM+RAM:4Gb + 512MB

MSM8255 1Ghz

App Connect is a feature of Windows Phone 7.5 that makes apps more useful and convenient—and that can also help you discover apps you didn't know you needed. You'll see evidence of App Connect in several areas of your phone. The Pictures Hub, for example, shows photo apps you've downloaded; the Music + Videos Hub lists apps related to music or video. Launching an app from either of these places can sometimes have added benefits: Depending on the app, Windows Phone might be able to send relevant information to the app to save you time—for example, the name of the artist or song you're playing. (In many cases, it's up to the app developer to make behavior like this possible, which is why you won't find all your photo-related apps in your Pictures Hub, for example.)
App Connect also comes into play when you do web searches, especially for movies, products, and places. In some cases, you'll see a relevant app suggestion right at the top of your search results. In other cases, you'll see apps mentioned when you drill into the details of a search for movies, products, and places—like a cinema app when you're looking at showtimes.

The people who create apps and games for Windows Phone are constantly making tweaks and improvements, fixing bugs or adding new features. When a newer version of an app you own is available for download in Marketplace, you'll know it.
On Start, you'll see a number on the Marketplace Tile that indicates how many of your apps have updates available.
When you open the Marketplace Hub, you'll also see a message at the bottom indicating you have updates available. Tap the message to see the list and start installing them.

Your phone might have temporarily lost its Internet connection, or you might be trying to download an app that's too big to download over your phone's cellular data connection. If you're trying to download an app larger than 20 megabytes (MB)—this applies to many games—you'll need to connect to a Wi-Fi network, or connect the phone to your PC and use the Zune software.
1.Make sure you have a connection. On Start, tap Marketplace.
2.At the bottom of the screen, you'll see the number of incomplete downloads. Tap it to see the downloads queue.
3.Tap and hold the stuck app or game, and then tap Retry. If it doesn't work, connect to Wi-Fi and try again. You can also connect your phone to your computer, start the Zune software, and download the app via Marketplace on your PC.