Pls, how can i reload my blackberry 7290 does not come up displaying error 507. I have tried to reload it but fail

Can we get some more information - what failed?

pls, can anyone tell me the meaning of carrier in blackberry

What mobile carrier do you use? Who is your mobile phone service with?

Examples: Vodafone, O2, AT&T, T-Mobile...

it does not come up, i tried to load but it fail,
the carrier is mtn nigeria
the PIN: 23E8433E
Blackberry 7290.
pls kindly help me out.

After downloading the operating system for my blackberry 7290, the blackberry manage does not detect the port. Or can i configure it manually.
Kindly help me.

Step 1 - How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ

Step 2 - if step 1 fails - What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ

Good luck.

When you plug the BlackBerry into your computer, do not use a USB hub. Only connecting directly to the computer will work. Also, if one USB port on the computer can't detect the BlackBerry, try another USB port.