Different mobile is different performance, how to get the better AR performance??

Hello Again,

Im in trial with vuforia studio and thingmark.
I do the mobile experience with my old VIVO 1611 (AKA. VIVO V5 plus) mid-range phone in early 2017

I think all is work well with Vuforia Studio. But

i got the trial-phone that is SAMSUNG Galaxy note8. Its top-range phone in late 2017
This phone is my company tool for test new app or anything company want.

Different thing is performance result
My VIVO make me feel better.

- It can keep tracking mark in more far range.

- less model shaking feeling.

I ever try with many my friend phone like Iphone8, Huawei P10, P20
I think the different thing is auto-focus system in top-range phone make mark tracking go bad.

I have some demo job with my customer, which is using the different phone (and more expensive than me).
When my customer seen the shaking model, its funny.

any suggestion to stop this issue?