virus can really cause damages
Nowadays virus can really cause damages to cellpones, especially on BB5 handsets.
Below are the referrences of Virus Symptoms On (mostly Nokia) Cellpones & Software Troubleshooting due virus to infections:
1- Blinking Only when trying to power on
2- Auto Reboot
3- Cannot Send SMS
4- Excessive Load Consumption
5- Cannot Open/Play files
6- Corrupted Phonebook
7- Contact Retailer (some may not be virus related)
8- Cannot delete data from sent/inbox folders
9- Memory Full (always)
Solution:
1- Hard Reset
2- Full Reprogramming
When dismantling any phone, great care should be taken to ensure that no damage is caused to any of the parts. Rough handling may result in severe damage of many parts, and if proper anti-static procedures are not followed, electrostatic damage may result in any electronic component.
Before commencing, it is recommended that the correct tools are purchased for the job in hand - at the very least, you will require a Torx T6 screwdriver..
Step 1. Protect the display with a film to prevent damage.

Step 2. Remove the battery cover.

Step 3. Place a plastic shim between the fascia and chassis and release the four clips indicated below. Turn the handset over and lift the fascia away.

Step 4. Remove key mat.

Step 5. Protect the screen with a film or similar.

Step 6. Also protect the inside if the screen window.

Step 7. Remove the MMC card door.

Step 8. Insert your shim between the aerial cover and the chassis and release all clips to remove the cover.