Quote Originally Posted by 2145 View Post
BEFORE READING: I don't know if SEUS supports updating W300's CID so correct me if I'm wrong on this:
The best (free) way to upgrade it is to debrand it with CID49 firmware and then use SEUS to update it to CID51. You won't experience any problems, but you won't be able to customize your phone.
If he update with SEUS isn't it a bigger chance that he will get cid52...?

And why do you want just thrat specific firmware? Can't ju find som newer cid49?

Yes you can flash it back later, but it will be some probs with cid51 as mourad_ada said.