Why could Bumble Bee talk at the end of Transformers?

I loved the movie, I just watched it for the first time last night when I rented it. I just have one question, I don't know if I missed something but, why could bumble bee talk at the end of the movie, how did his vocal thing get fixed?

I was wondering the same thing. My bf and I watched it (for the 2nd time) over the weekend and when I asked him he didn't have an answer either. I think the answer is that there is no answer. I don't think you missed anything.

In a case like this, the writer/director is leaving it up to us to infer what happened. For example, if you'd like to think it was just some fluke that occured when he was injured in battle, then think that. If you'd rather thing that the power or his new friendship cured him or something like that, then think that instead.

i have no idea but it was a greatttttttttttttt movie and im a female lol i have brought my son all the toys for xmas 10 /10 for the movie

Witchcraft....Whenever something happens without explanation in a movie Blame witchcraft....Oh..and Piss poor writing.

My theory is that because he was the one holding the all spark. It may have fixed him and didn't know it. The piece that Optimus pulls from Omegatron is what fixes him completely.