Not from me, as I don't know any. as far as I know, any PSTV should ship with 3.60- as it has been discontinued. And the Borderlands bundle too. Although anything from amazon should be OK with their return policy.
Phat better screen
Slim better battery life
I would go for screen.
Chances of finding brand new phat are slim to none.
Every slim comes 3.51 or 3.60, exceptions are those japanese models, as stated above
So return it, and try your luck on a next one
Just returned the product will get the new one once I get the refund. About fat psvita it comes with joystick problems. I herd lots of rumors about it plus I had fat vita with fault joysticks & they are not fixable. I bought new joysticks & did the replacement but didn't work. I'm scared if I buy fat vita I might get this joystick problem in future.