Same WiFi speed is much better with Hotspot from other device

[justdream]

Hi Dears,

-I have Surface Pro 3 windows 10, always keep updating the system,
-I have noticed that Surface pro 3 wifi speed is less than other devices like smartphone and office laptop (while they are connecting to same WiFi),
noticed same issue in many different WiFi access points

-Due to above observation, I started to do hotspot from office laptop or smartphone to my surface pro 3 and noticed big difference in WiFi speed (althoug all of them using same WiFi)

*Any idea, what tis issue technically means?
**How to solve this issue, to have higher WiFi speed in my surface pro 3 without having hotspot from other devices

 

[justdream]

Hi Experts,

kindly do you have any idea about this case and how to solve