MY Dear same problem I had before. But Now I am enjoying OS 6. I updated may be 20 times but after that same OS 5 was found SO Want to share with you my experience.
1. Back up your contacts, Messages, mails etc by using Blackberry desktop software.
2. Close BB desktop software
3. Download & install BBSAK software, you can find it very easily through Google.
4. With BBSAK software wipe your device. (It will erase your OS 5, This is what I think you are not doing)
5. Insatall os 6 BY using BBSAK or directly from C drive location.
6. Dont not disturbe the process, wait until it gives you confirmation of successful installation.
7. Enjoy.
For any assistance mail me at
![[email address]](?emailimage=43367335a8ea19400710ced929ee98ae)
If successful also mail me at same address.
Thaanks & regards,
Muhammad Irshad