Which mobile acquiring to choose?

Question

Payment systems

Hello, I would like to accept plastic cards using a phone and a gadget to it.
I’m now considering 2Can vs Life-pay vs Sum-up
2Can takes its investments, Yandex works with them and Sberbank was once going to
Sum-up a European startup with Svyazny
Life-Pay an ordinary company, but Yandex is now considering it instead of 2Can
Maybe already someone worked with them.