Unlock versions

Hi all !!!
can someone tell me if there are any versions apart from 3330 v 4.30 which i might have a problem unlocking.Any info will be very helpfull.
Many thanks.
Rob

Yes there is, with the version 4.30 and 4.50, it´s a little bit more difficult to unlock.
Don´t make the unlock without know how to do it.
And remember allways make a full backup(it´s our best friend)

hi Rob,
in attach you find solution.testet 100o/o!
make full bakup of phon is the best,its safe for you! OK!
hir find solution for new ver.3310v5.11.
Gabi.

Hi!!! Thanks very much Jsantos & gabi, I have a 3330 v 4.50 how do i know if a back up is made? I have tried to make a back up before but can't find it later.
I use nokia flash tool & also have Rolis 471. Can i make back up with theese?
All the best
Rob.

The backup will be called flash.out

Thanx sean.