You can obviously choose to not read the thread from the title.
I had mentioned in another thread some time back. My dad picked up a classic from his 9900. So I asked him today how's it going. He said not so good. Search is very slow. Searching a contact from universal search or the contact app is very slow. The bold even was so fast. The phone has frozen on him a couple of times forcing him to restart. And he's absolutely right. The search, speed dials is pathetically slow on BB10. No where near to what it was on BBOS. I have waited software update after update. 10.3.1 only made a little bit more worse (atleast for me). Feeling rather disappointed. He took the phone solely on my recommendation and he isn't happy with it.
Q5SQR100-3/10.3.1.2576