Unable to browse websites

The next logical step is to investigate the possibility of having a problem with the hotspot itself - or, perhaps, the associated Cellular data plan preventing access.

In addition to checking the hotspot device for issues, you might check the DHCP assigned IP and Gateway (Router) addresses that are assigned to your iPad by the hotspot.

Your mobile being able to access the internet is no guarantee that it is correctly routing internet traffic via the hotspot interface. You need to verify that you have a suitable IP and Gateway (Router) Address - and subnet mask - supplied by your mobile via DHCP, to your iPad.

Post these details here for review.