Is There Any Way To Upgrade Firmware By Myself?

No there is no way you can do it with BT or IR.
You need to buy a special device for it.

What Is The Davice? And Where I Can Buy IT?
Maybe Anyone Can Help?

You should search the forum for similar threads,i think the hardware is preety expensive though.

What Is The Name? What Words I Should Search?

Try searching for posts from Fox Hound,
or PM him and you will get all info about that it think.
He has one of those i suspect.

try this one 😃
http://www.allaboutsymbian.com/phpBB2/viewtopic.php?t=4295

It's Nokia's Flash Box, it can upgrade and downgrade and even change languages. In just a flash... 😊

[quote="😊"]It's Nokia's Flash Box, it can upgrade and downgrade and even change languages. In just a flash... 😊[/quote]
stop with the changing languages stuff still no arabic 😞 😞 😞

[quote="😊"]It's Nokia's Flash Box, it can upgrade and downgrade and even change languages. In just a flash... 😊[/quote]

not just all of these

but you can also make ur phone shows "Contact Retailer"

so backup the original files first

😃 😃 😃 😃

http://gsm-technology.com/index/USA,en,USD,details,id_gr,81,id_pr,592.html

thanks to aespina for the link

So is there any device or flasher that will let me fix the "contact retailer.." bullshit screen I got ?
I think all hardcore 7650 users need it.

[quote="PURPLEMUSTANG"]So is there any device or flasher that will let me fix the "contact retailer.." bullshit screen I got ?
I think all hardcore 7650 users need it.[/quote]

yes the all flasher can fix that "COntact retailer"

if u hav the flasher just find the original file then flash it into ur phone and ur phone will be fixed

[quote="FOX HOUND"][quote="😊"]It's Nokia's Flash Box, it can upgrade and downgrade and even change languages. In just a flash... 😊[/quote]
stop with the changing languages stuff still no arabic 😞 😞 😞[/quote]

I read in another site that it does change to arabic! :-?
Pretty sure it says so, but still even though, nobody tried it