Spec Req for cellphones

Any thoughts on min/max specifications for a roughly decent quality cellphone by '16 standards?

How many cores should it have? Is 512 mb ram too little? How much ram is too much on a smartphone? Other spec req?

>>5
I use a web browser, IM, SSH, music player and e-book reader and I've never had a problem with 1GB of RAM, but I flashed my phone with Cyanogenmod so there's that. You rarely need more than 2GB of RAM, though.

My Quake 3 Arena multiplayer server runs in 256MB of RAM, why do phones have to be so resource hungry?