1) Make sure you have Blackberry Desktop Manager installed.
http://na.blackberry.com/eng/services/desktop/
2) On your PC, go to Start > Run and copy and paste the following line exactly (meaning with the quotation marks):

"c:\program files\common files\research in motion\apploader\loader.exe" /nojvm

3) The Application Loader Wizard will appear -- click "Next."
4) In the "Connection:" drop-down menu, you should see "USB-PIN: UNKNOWN". Click the "Next" button.
5) You should then see a list of applications ready to be installed for your Blackberry. Hit Next and Finish and you are well on your way to getting your Blackberry back to life. Congrats! Just don't disconnect anything and let the lengthy process finish completely.

NOTE: If you do not see a list of applications mentioned in step 5 and instead see the message "The Blackberry Desktop Software does not have Blackberry Device Software for the device that you have connected to the computer. Contact your wireless service provider or system administrator," then you must download Blackberry's Operating System for your carrier and device.
http://www.blackberryfaq.com/index.php/BlackBerry_Operating_System_Downloads
Just select the appropriate carrier and network type, select your Blackberry model from the list and download the latest version. Install this download and follow the above steps again and you should be on the right path.

Additional information:
http://www.blackberry.com/btsc/KB24395 "Error 523", "App Error 523", or "JVM 523" appears on the BlackBerry smartphone

Article ID: http://www.blackberry.com/btsc/KB10144
KB10144 How to force the detection of the BlackBerry smartphone using Application Loader

I got that from: http://supportforums.blackberry.com/t5/BlackBerry-Curve/App-error-523-reset/td-p/1743575

RIM Blackberry... | Answered on Apr 10, 2014

1 Answer

I got three samsung galaxy stellars unlock code so i can use another company and the i got is verzion but i want to switch over to H20

Verizon is CDMA and it sets the phone's code to all zeros, so it cannot be unlocked by unlock codes.

RIM Blackberry... | Answered on Apr 23, 2013

1 Answer

Screen keeps going white and giving me a app error 523

Your Blackberry probably just needs a firmware restore. Here's a guide on how to restore the blackberry firmware, the website is at : Restore Blackberry to factory settings.Download the Blackberry Desktop manager and run the application loader. Make sure you check to delete old applications in advanced tab. Carefully all you datat will be wiped.

RIM Blackberry... | Answered on Apr 19, 2013

1 Answer

Unlock a blackberry edge 8310

To unlock a blackberry you need a code, we make those codes (which are unique to you) using the imei number and prd code, which can be found under the battery on the phone looks like prd-xxxxx-xxx , we deliver our unlock codes by email in about 2 minutes with instructions.

http://blackberryunlocking.biz/ and you can also watch our video showing the instructions in action

http://www.youtube.com/watch?v=I2cPTIVV6GY

RIM Blackberry... | Answered on Feb 03, 2013

0 Answers

How do i fix my blackberry with the app error 552 reset?

RIM Blackberry... | Posted on Dec 30, 2012 | Be the first to answer

1 Answer

I need help unlocking my phone

Hi, What is the specific model of your mobile phone? You can visit www.simpleunlocking .com to get the accurate unlock code for your mobile at low cost. Before that you can visit www.mobileunlockguide.com this site provides free unlocking instruction guide. This could help you understand unlocking process better.

RIM Blackberry... | Answered on Nov 06, 2012

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Need the mep code for bb pearl 8110

RIM Blackberry... | Answered on May 20, 2012

3 Answers

Blackberry 8310 8320 8330 Curve 8100 8110 8120 8130 Pearl Car Charger / Veh: my 8250 keeps saying app error 523...

Try to reload the OS...will probably fix it.

RIM Blackberry... | Answered on Apr 13, 2012

7 Answers

I need the unlock codes for blackberry 8320

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RIM Blackberry... | Answered on Feb 14, 2012

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I need a free MEP IMEI unlock code for blackberry

Get your unlock code with instructions to enter it in 5 minutes, from http://blackberrymep.com , just for 10 usd , don't waste your time asking for free solution .

RIM Blackberry... | Answered on Feb 11, 2012

1 Answer