I loved my 3T as a piece of hardware. Only problem was I couldn't live with Google spyware, and Android without gapps - despite all the wonderful work done by this team - is barely functional as a modern smartphone, sadly.

Unfortunately oneplus only sells accessories for the last and current generations. Really sucks cause my 3 is still working flawlessly but I can't find a good screen protector for it.

I still find (good) screen protectors for my OnePlus 2 on amazon. You don't necessarily need the official ones from OnePlus.