Why is my Wi-Fi on a laptop better than on a cell phone?
With a laptop, it is easier to install an antenna in a suitable place. It is usually at the top of the screen.
In such a laptop there's more space for the antennas. LTE, GPRS are often shared in mobile phones and, like all cheese, the antenna is called wlan and bluetooth. Besides that, they're smaller.
the length is sometimes decisive.
There's more space in the laptop to lay out an antenna, so the reception is also better.