My BlackBerry 8800 says GSM Radio not connected

SOURCE: free unlock of blackberry pearl 8100

Option # 3: T-Mobile or Cingular, your carrier
Yes, you can ask your carrier for an unlock code for your Blackberry and guess what, they do it for it Absolutely FREE. So, what is the catch? The only condition which atleast T-Mobile imposes on its customers before it gives out the unlock codes for the Blackberry Pearl or any other cell phone is that you have to be under the contract for atleast 90 days or 3 months before they can give you the unlock code. So, if you have the patience, I would recommend that you wait for this 3 month time frame before calling up 611 from your T-Mobile phone, talk to customer service and get your unlock codes.
In my search for the Blackberry Unlock codes, I found out that a lot of people mess up before they have no idea how to enter the unlock codes correctly. So, follow this method to enter your Blackberry Unlock code
How To Enter the Unlock Codes on a BlackBerry Cell Phone

Model : All BlackBerry Models (except T-mobile)
1 - Using the menu go to Settings Menu -> SIM card press select.
2 - While holding the SHIFT key, type MEPD or (MEPPD for Vodafone Handsets)
3 - You should now see the five locking categories listed.
4 - While holding the SHIFT KEY, type MEP2 or (MEPP2 for Vodafone handsets)
5 - Release the shift key.
6 - You are now prompted to enter the Network MEP code (it will also state how many attempts left)
7 - Enter the code
8 - Enter Return/Enter
9 - The device should then be unlocked
Model : T-mobile BlackBerry Models
1 - On the Home screen, click the Tools icon. The Options screen appears.
2 - In the tools screen, select the Settings icon.
3 - Scroll to SIM Card and select it. You should see the phone number and the SIM ID number.
4 - Type ‘mepd’ to display the first five levels of SIM locking.
T-Mobile uses network locking so the Network should display Active. All other states should display Disabled
Please note: For the Blackberry 7100t you will hit the “P” twice when entering the ‘mepd’ and ‘mep2′ for steps 4 & 5.
5 - Type ‘mep2′ to display the dialog box asking for the unlock code (Press the Alt + 2 key to get the number 2)
6 - Input the Network Unlock code
7 - Press ENTER and reboot handheld.
Model : BlackBerry Pearl 8100 (Alternative instructions if above instructions do not work)
Can be done without a sim card inserted
To Unlock:
1 - While on the home screen, click the “blackberry key” on keyboard, then select “options”.
2 - Choose “Advanced Options”.
3 - Select “Sim Card”
4 - There is no area to type these letters, you just type them as instructed. No need to hit keys twice to get a letter either. Type m e p p d to display the first five levels of SIM locking. Most companies use network locking so the Network should display Active. All other states should display Disabled ( you will not see text appear on screen
while typing )
5 - Type m e p p 2 to display the dialog box asking for the unlock code
(Press the Alt + 2 key to get the number 2) ( you will not see text
appear on screen while typing )
6 - Input the SIM Unlock code
7 - Press in the trackball in once
Your phone is unlocked

SOURCE: unlocking BB 8800

you can get the unlock code here: http://www.gsmunlocklabs.com/unlock-cingular-blackberry-c-41_42.html

SOURCE: USB connection failure to Blackberry 8800

I have the same problem.  The following solution may apply; here is how to IDENTIFY the problem: (1) Phone doesn't connect to desktop software through USB but will through BT (if setup) (2) Phone doesn't charge whether USB-computer, USB-wall, USB-carcharger or does sometimes but you are not sure why it works sometimes but not all the time (3) If you hold, lean, twist, or jiggle the plug at the phone, it may charge or the charge icon may show briefly (Also) Plug is noticeably loose or comes out Solution: if plug is torn loose, damaged, or comes all the way out, go to this site and follow along in kind http://computerguru365.blogspot.com/2006/02/diy-blackberry-usb-repair.html If plug is simply intermittant: remove all power and the battery, open your phone, and carefully redo the solder joints of the plug.  If you don't have a SMT (surface mount) rated soldering iron w/ tip, you can use the radio shack standard but be sure to only apply the hot tip in pulses (less than/up to 50% of time, less than 3sec each touch) so you don't heat damage the surrounding components. Why: Because the plug gets tugged to the sides causing the solder joints to crack (microscopically).  At first I had to lean books against the plug but then that quit working as well.
This approach also worked on my laptop which quit charging when plug torque flexed the motherboard and cracked the solder at some surface components near the plug.  I found out which components when the varying the force of my multimeter tip cause the component to show open and normal across the solder joint

Otman Lahlou

• 10 Answers
• Posted on Mar 11, 2013

SOURCE: free unlock of blackberry pearl 8100

It's a clear and fully detailed guide on how to unlock a BlackBerry 8100:
1. Insert any sim card
2. Turn off all of the wireless connections
3. Go to Options
4. Select Advanced Options
5. Select SIM Card
6. Hit menu select show keyboard (if your BlackBerry have touchscreen)
7. Type MEPD ( you will not be able to see what you are typing )
8. Type MEP2 ( you will not be able to see what you are typing )
9. Now the phone will prompt you to enter network mep code
10. if you not already have the code, then i suggest BlackBerryMEP.COM to get it from .
11. Enter the code ( you should see "code accepted" )
12. Restart your BlackBerry .
All done.
SOURCE : BLACKBERRYMEP.COM