First of all, this is not a guide on how to remove carrier information from a Blackberry. If you're unable to use a different SIM card than the one that was originally supplied with your device, look elsewhere. However if, like many others you have a Blackberry that is locked by a BES, meaning you're unable to change certain settings, or install Third Party Applications then read on. Essentially, the problem is that your Blackberry has at some point been connected to a BES (Blackberry Enterprise Server), and this BES has placed a restrictive Security Policy (or IT Policy) on your device. A quick check to see if this is the case can be done by going to Options/Security on your Device. If you see any references to IT Policy whatsoever, then you have a potentially restrictive IT Policy that can be removed.
here steps
1.backup the device using Desktop Manager if necessary.
2.run JL_Cmder and select reset to factory(The device will do a security wipe of the device; (meaning wipe your data but leave the OS, DO NOT use the "Wipe" command in JL_Cmder) then reboot leaving the OS, 3rd party apps but no data AND, best of all, NO IT policy whatsoever)
When you're done, simply restore your backup and you're good to go with no policy or locked firewall
enjoy
gsmdocter
here steps
1.backup the device using Desktop Manager if necessary.
2.run JL_Cmder and select reset to factory(The device will do a security wipe of the device; (meaning wipe your data but leave the OS, DO NOT use the "Wipe" command in JL_Cmder) then reboot leaving the OS, 3rd party apps but no data AND, best of all, NO IT policy whatsoever)
When you're done, simply restore your backup and you're good to go with no policy or locked firewall
enjoy
gsmdocter