login via windows mobile 5 on smartphone

on 2.9 ver of router os i can use cell phone internet to remotely login with http but with ver 3 i am unable to login. it puts some weird symbols up in the corner of the screen after entering username and password. any help would be appreciated because we use this to add clients to access list in remote areas.

I needed to correct this post. It is just the routerboard 600 that I can’t login to.