How to detect a mobile device?

I want to detect a mobile device and enable the custom mobile GUI. The code I have right now is not working as it displays the PC GUI every time I play on mobile.

local UIS = game:GetService("UserInputService")
local GuiService = game:GetService("GuiService")

if UIS.TouchEnabled and not UIS.KeyboardEnabled and not UIS.MouseEnabled
	and not UIS.GamepadEnabled and not GuiService:IsTenFootInterface() then
		script.Parent.Enabled = true -- MobileGUI located in StarterGui
else
		script.Parent.Parent.ZedsMarketPC.Enabled = true

end

Any help would be appreciated.

Here's a guide

local userInputService = game:GetService("UserInputService")
 
if userInputService.TouchEnabled then
	print("The user's device has a touchscreen!")
else
	print("The user's device does not have a touchscreen!")
end