I bought this phone before one month and I had no issues faced till now.i cant give u an good imformation about the one plus service as I didnt need to go there.this phone can compete and win with any phone in the market right now.and even software updates will be regular.so you can blindly go for it.
in the box we get an power brick, usb cable type c, andthe phone with sim ejector tool.the phone here comes with a screen guard preapplied.