Easy tether on MT1300

Luci shows I am connected via easy tether but I am unable to surf. I have added

config zone
option name ‘wan’
option input ‘REJECT’
option output ‘ACCEPT’
option forward ‘REJECT’
option masq ‘1’
option mtu_fix ‘1’
option network ‘wan wan6 wwan easytether’

And I still cannot surf