I just recieved a friends old pearl, and I was trying to do a master reset, so it was just like when he got it out of the box. I downloaded the Jl_Cmder and i wiped the phone, so now it has no bb OS on it. I cannot figgure out how to reinstal the os, or where to download it. any suggestions would be appreciated.

thanks alot

You can download the software here:
https://www.blackberry.com/Downloads...E4F82F9F00E7D4

Download the software and install. Open Desktop Manager and connect your BB to the PC. Install should be automatic from there.

I cant get my blackberry to connect to the computer, the screen shows up with a picture showing there is not os on it, so therefore it will not boot up at all....i hope i didnt screw this phone up

Your BB has no operating system on it, so it can not be seen by Desktop Manager or the PC.

Check out this FAQ please - How do I upgrade the OS on my BlackBerry? - BlackBerryFAQ