So what ip are you trying to access. Where do you think you have a router.
You have a connection to a 3g broadband network that I assume is some like of modem. You normally have no access to default gateway on these because the vendor owns the router.
You also have a VPN connection which does not use real routers.
Just guessing I am going to bet the VPN software is causing your problems. You have 2 ipv4 default gateways. You cannot have this. Now sometime the VPN software will override this but you cannot tell that from this screen.