BlackBerry® Curve™

[dj_713]

hello everydoby

i have i blackberry curve 8520 and was 5.0 os and i downgrade to 4 .

now i can't go back to 5 every time say to contact admimistrator or go to

www.blackberry.com\servise   .i go there but i did't find nothing

i want to chane language to put greek for that i downgrade and now i can't go back

help please

[sdgardne]

Hi and Welcome to the Community!

At the top of each device forum, there should be some "sticky" threads that discuss the OS levels available for many models. If they include your model, then please use those as reference as you proceed. Otherwise, you will have to dig through the official download portal for OS packages for your model:

• http://us.blackberry.com/support/downloads/download_sites.jsp

From a PC, you can install any compatible (e.g., for your exact BB Model Number) OS package to a BB via this procedure:

• http://supportforums.blackberry.com/t5/BlackBerry-Device-Software/How-To-Reload-Your-Operating-Syste...

Note that while written for "reload" and the Storm, it can be used to upgrade, downgrade, or reload any BB device model -- it all depends on the OS package you download and install to your PC. If that OS package is from a carrier other than the carrier for which your BB was originally manufactured, then delete, on your PC, all copies of VENDOR.XML...there will be at least one, and perhaps 2, and they will be located in or similarly to (it changes based on your Windows version) these folders:

• C:\Program Files (x86)\Common Files\Research In Motion\AppLoader
• C:\Users\(your Windows UserName)\AppData\Roaming\Research In Motion\BlackBerry\Loader XML

Be sure that you remove, from your PC, any other BB device OS packages as having more than one installed to the PC can cause conflicts with this procedure.

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If you are on MAC, you are limited to only your carriers sanctioned OS packages...but can still use any levels that they currently sanction. See this procedure:

• KB19915How to perform a clean reload of BlackBerry smartphone application software using BlackBerry Desktop Software

Good luck and let us know!