What phone you using?The game is a laggy piece of shit for me 90% of the time, and randomly the other 10% of the time, usually early in the morning, the game runs like a dream. Doesn't matter if it's LTE or Wifi so it's not an internet issue, and I'm unsure if it's just my phone being shit and old (in which case why does it run amazingly well sometimes?) or is it Niantic's servers being shitty (in which case why the fuck does it affect menu scrolling and the slideshow when trying to catch a pokemon)
Galaxy S5
Maybe get a phone from this decade. Phone came out in early 2014.
I have an S7 as well and it also runs like shit. The whole game is coded like shit and run by idiots it goes to show you how fire the pokemon franchise is to support such a garbage game.