reset a blackberry smartphone

reset a BlackBerry smartphone to factory defaults, complete the following steps:

Warning: Back up the data from the BlackBerry smartphone to a computer first.

On a 32-bit Windows XP to Windows 7 operating system (OS), complete the following steps:

Connect the smartphone to the computer.
On the computer, click Start > Programs > Accessories > Command Prompt. (Note: For Windows Vista and Windows 7, right-click and run as Administrator.)
Type cd C:\Program Files\Common Files\Research In Motion\Apploader and press ENTER.
Type loader.exe /resettofactory and press ENTER.

On a 64-bit Windows XP or Windows 7 OS, complete the following steps:

Connect the smartphone to the computer.
On the computer, click Start > Programs > Accessories > Command Prompt. (Note: For Windows Vista and Windows 7, right-click and run as Administrator.)
Type cd C:\Program Files (x86)\Common Files\Research In Motion\Apploader and press ENTER.
Type loader.exe /resettofactory and press ENTER.
Note: BlackBerry Desktop Software 4.7 to 6.0 must be installed on the computer. The BlackBerry smartphone must be running BlackBerry Device Software 4.3 to 6.0.

On a Mac computer, complete the following steps:

Close the BlackBerry Desktop Software if it is open on the Mac computer.
Open Terminal.
Type cd /Applications/BlackBerry\ Desktop\ Software.app/Contents/MacOS/ and press Enter.
Type ./bbdm resettofactory
Note: In the Mac OS X environment, if the BlackBerry smartphone has a password set, you must specify that password within the command. For example: ./bbdm -password 12345 resettofactory (where 12345 is the BlackBerry smartphone password).

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