Welcome to the official BlackBerry Support Community Forums.

This is your resource to discuss support topics with your peers, and learn from each other.

inside custom component

BlackBerry® OS Smartphones

New Contributor
Posts: 3
Registered: ‎02-01-2009
My Device: Not Specified
Accepted Solution

Device error: 400

Hi! I am using a blackberry 7290 and it's caught in a crash loop. Whenever I reset my handheld, it gives me a device error: 400. I looked at the support site and found an answer but on step 8, when you need to find the application in the application manager, I can't find the application. It is the only application on my handheld but it does not appear in the application manager window. Help please?
Posts: 5,339
Registered: ‎09-20-2008
My Device: ***
My Carrier: ***

Re: Device error: 400

Check the link below:




There are instructions how to restore your device.

Elite II
Posts: 9,321
Registered: ‎04-01-2008
My Device: Torch 9800
My Carrier: grameenphone

Re: Device error: 400

Check steps below for OS upgrade -


Step #1

Before starting make sure that BlackBerry Desktop Software is installed on the computer.



Make sure that you have installed updated device software installed in your PC. Check this link to get update device software from carrier OS download site.



Users can perform a full or selective backup of the data using the Backup and Restore tool in BlackBerry Desktop Manager by completing the following steps:

  1. Connect the BlackBerry device to the computer running BlackBerry Desktop Manager.
  2. Open BlackBerry Desktop Manager.
  3. Double-click Backup and Restore.
  4. Select Backup to perform a full backup or select Advanced to perform a backup of specific databases.
  5. Choose a location to save the backup file, then click Save.


To perform a clean install of the BlackBerry Device Software, perform the following steps:

  1. Connect the BlackBerry smartphone to the computer and open BlackBerry Desktop Manager.
  2. Double-click the Application Loader icon.
  3. Click Next to start the installation process.
  4. Type your BlackBerry smartphone password, if prompted, and click OK.
  5. Click the check boxes next to the names of the applications you want to load, and then click Next.
  6. Click Advanced, and then click the check box beside Erase all currently installed applications.
  7. Click Next.
  8. Click the check box next to Do not automatically backup the application data during the loading process.
  9. Clear the box next to Backup and restore applications installed wirelessly.
  10. Click Next > Finish.
  11. When the process has completed, the message The loading operation was successful will appear. Click Close to return to BlackBerry Desktop Manager.

If your query is resolved then please click on Accept as Solution

Click on the LIKE on the bottom right if the post deserves credit

New Contributor
Posts: 3
Registered: ‎02-01-2009
My Device: Not Specified

Re: Device error: 400

Thanks! I got it to work by updating my software!
New Member
Posts: 1
Registered: ‎09-04-2010
My Device: 8520
My Carrier: Vodafone

Re: Device error: 400



thanks a lot bro. u have  no idea as to what u have done for me by guiding me in fixing my phone.