I recently bought an A3100 in Hong Kong. English was sold out all over Mong Kok but I did manage to find a simplified version after all which is fine for me.
Well, I can say Pleco runs on it without any problems so far. So far I am also pretty satisfied with the phone. Although I have to say that I don't really use for anything besides phone calls, short messaging, and Pleco. If there are any specific questions, I could try to answer.
Christoph