- First download Navifirm and extract it to your desktop in a folder named Navifirm
- open Navifirm and choose by server: Nokia care suite
- Now browse for your phone in my Case it is the nokia lumia 610 (RM-835)
- Download the firmware 8858
- Wait for it to finish download can take up to ~10 minutes
- After the download is complete navigate to the Fw folder and stay there!
Step 2) Flashing the firmware:
- Download and install nokia care suite 5.0 from the link in this thread
- Open the Application launcher and from there choose (Product support tool for store 5.0)
- Now connect your nokia lumia 610 to your pc and leave it powered on!
- Go to file and open product type in RM-835 and choose the device
- and then by no connection choose USB1 RM-835 and click on the sync button.
- Now click on the tab programming and choose recovery.
- in the down right corner you see download progress and behind that a
green squere click on the arrow behind the green squere and choose
''open data package location''
- The folder should be empty that is good now go to the Navifirm folder
and copy all the files inside the Fw folder to the folder from Nokia
care suite!
- DO NOT FORGET TO CICK ON UPDATE LIST!
- after you done that click in nokia care suite on the
1066.0000.8858.12470 firmware and click on start your phone will shut
down and the screen will stay black.
- Wait for the progress to be done and your phone will have WP7.8!
Nokia Lumia 505, 510, 610, 710, 800, 800C and 900.
How can I update my Nokia Lumia phone with Windows Phone 7.8?
Software
updates from Nokia and Microsoft are free of charge and safe to
install, and your settings, apps, photos, and text messages will remain
safe and sound.
Your phone notifies you when an update is available for you
Step 1.
To update your phone, you need the Zune software (Windows) or Windows Phone app (Mac) on your computer. Zune software Windows Phone app
Step 2.
Connect your phone to your computer with a compatible USB cable.
Step 3.
Start the Zune software or Windows Phone app and follow the instructions shown.
Watch the video on how to update your phone using the Zune software
How can I check whether updates are available for my phone?
Update
availability may vary depending on your phone model, region, and
network service provider or carrier. Here’s how you can get
notifications about new updates: Step 1. On your Nokia Lumia, go to Settings, and tap phone update. Step 2. Switch Notify me when new updates are found on. Step 3. If you want to allow your phone to check for available updates using your mobile data connection, switch Use my mobile data connection to check for updates on.
Furthermore, Zune notifies you if new software updates are available when you connect your phone to your computer.
Alternatively, you can also check for the availability of software updates in your region from the links in the navigation.
How do I prepare for an update?
Before
starting the update, make sure your phone has enough battery power. If
the battery level is low, charge the battery before starting the update.
Check that your phone is set to the correct date and time. With a wrong date or time, your phone won’t be able to access the updates.
Make
enough space on your phone for the update. If necessary, remove a few
unwanted apps or other large items. To see how much free space you have
on your phone, on the start screen, swipe left to the apps menu, tap Settings > About, and check the amount of available space.
Free
up space on your computer, as you need enough space to download the
software update, and to save a backup of your existing phone software,
settings, and media files.
What if I have trouble installing an update?
If there’s a problem, try the Installing or updating your Windows Phone 7 software wizard.
It provides step-by-step instructions to resolve the most common
problems. If you get an error code, write it down. To find out what went
wrong and what you can do about it, check this page.
Your phone is backed up automatically when you update your phone software. Should there be any problems later, you can restore your phone to its previous state.
If you can't find a solution to your problem in the info above, you can also try our Discussions community, or the Microsoft support pages.