My blackberry bold 9870 keeps rebooting

SOURCE: Bold 9000 doesn't want to start up, keeps restarting

the solution for this issue is
1)install the blackbberry desktopmanager
2)take backup of your handheld
3)re install the software

SOURCE: Blackberry Bold 9000 Keeps rebooting, sometimes blank screen

http://crackberry.com/blackberry-101-lecture-12-how-reload-operating-system-nuked-blackberry

SOURCE: i download a software the screen frozen on the

is very simple upgrade the software then plug your blackberry with your computer delete your old software from your blackberry and install the new one now works better and faster

SOURCE: jum error 102

First, download and install the latest version of BlackBerry Desktop Manager software from: https://www.blackberry.com/Downloads/contactFormPreload.do?code=A8BAA56554F96369AB93E4F3BB068C22&dl=DA5FB46338C8C0DCB1039F7898184FC5

Once installed, connect your BlackBerry to your computer via the USB sync cable. Open Desktop Manager, and click the Application Loader. On the right, you will see Update your device software. Click the Start Button, and if your BlackBerry is not on the latest Handheld Software, an update will appear. Select the update, and run the install. Be sure to select the option that backs up and restores your data. Once started, do not shut down your computer, or disconnect the USB sync cable as this could damage the device.

Once completed, your BlackBerry will restart and you will have the latest version available. This version has been known to correct various issues.

If the issue is still present, then it could be hardware related, and may need to be repaired or replaced. I would then suggest contacting your Provider for Hardware Support.

SOURCE: my blackberry bold keeps rebooting...why?

maybe it has a virus or your battery is faulty try borrowing a freinds battery to see, if not take it in to where ever you bought it. or your circuit board could be going. thats seriouse