Today I think this is the best mob for a smartphone.
Firstly, this is the attitude of the developers towards the players; the support team is not bots, but people, and they really try to help the player.
Secondly, there are very frequent updates and events, many champions, very frequent rebalances, which is very good, because the skill here matters more than the meta champion.
Well, thirdly, the game is stable in terms of ping, in the same Mobile Legends you will simply be on fire from an unstable ping, and then you will have smooth gameplay throughout the entire game.
Oh, and in the fourth place - Kamon is LoL on smartphones.
I definitely recommend checking it out.