Solid choice. No idea what your region is but just male sure the version you get can have the boot loader unlocked. I know Verizon locks theirs, so you cant install graphene on phones purchased through them. 

 UK, so will get one that’s unlocked for sure

Many options for eSims and some that can be bought with Bitcoin 

 I've got a 7a with graphene, been running smoothly for 8-9 months now. 

 That’s good to hear.

Thanks! 

 Atta kid!