Board Thread:Questions and Answers/@comment-35202410-20180810134546/@comment-33362357-20180810150817

I'm using a Redmi Note 4 (the 4 gig RAM variant) to play FGO right now! It's definitely slower than a Snapdragon 820 phone, but bearable. FGO hasn't crashed on me yet. Animations are janky, especially NPs. There's some lag and it's not as smooth as it should be. But it works. The Adreno 510 in the Snapdragon 625 (the RN4's chipset) isn't a very powerful graphics card.

You can probably find used Snapdragon 820 phones on eBay or Swappa.com for that price, like a used S7, LG G6, or LeEco Pro3 Elite (see Banggood). The Adreno 530 (and higher) is quite powerful.

Or you should get a used iPhone SE, since gaming on iOS is way better. The only issue for the SE is the lack of RAM--I don't know how much FGO will crash. On my last iPhone (iPhone 6), FGO crashed a lot because the phone couldn't keep the game in memory.