I have a Blackberry bold with is dead only has flashing red light I am trying to follow the advice given in the link below The problem is i don't know what OS system to use for this phone.

supportforums.blackberry.com/t5/Device-software-for-BlackBerry/Dead-BOLD-9780-after-device-update/td-p/943939]Dead BOLD 9780 after device update - BlackBerry Support Community Forums[/url]

Welcome to BB Forums.
Follow the instructions in this thread - Latest OS: 9780 6.0.0.668 (Multilanguage) - to the letter and you should be good to go.

I tried this and get error message Application loader was unable to connect with your device.
Now the phone keypad lights up but phone is still dead
I think i might have a Blackberry Bold 9700 how do you tell them apart is it possible i might be trying to put the wrong os system on?

Take the battery cover off and remove the battery. Look and see if there is a label with the model number printed on it along with PIN, etc. I don't remember for sure what is there on the 9700.

the numbers i can see are as follows

BT MAC CC55ADF2B59C
CE0168
354261/04/1657/
BB PIN 236AB2EC
Made in Hungary

Would i get the error message if i was trying to load the wrong operating system
Application loader was unable to connect with your device

Edit

Aparently RIM does use other countries to make BB's so you may have to insure the OS is compatible.

Every time i try and load operating system i get
Unable to reconnect to the device during a multi-stage load operation.
now the keypad is always lit
What should i try next?
Is their a way of removing the software on the phone?

Use JL_CMDER or BBSAK to wipe the handset. See blackberryfaq.com.

Troubleshoot problem connecting to device. There is a sticky thread here on the forum and a knowlege base article at blackberry.com.

If you have run down all the possible connection issues and still can't get it, try using a different computer.
Posted via BlackBerryForums.com Mobile

Here is the KB article I had in mind: KB04269-Unable to connect to the BlackBerry smartphone during a multistage loading operation 0 85624172

Most of the time you will find answers by searching on the exact error message.

Did you figure out what model you have, and that it is a genuine BlackBerry?

If i look at the screen under a bright light because the back light not coming on i can see text. The text states SD Card bad or missing is this part of the problem?

Remove the card and see what happens.
Posted via BlackBerryForums.com Mobile

The card is missing The os vision its running on just about make it out is 6.6.0.236