OTRmobile changed their plans about 2 months ago. They used to be truly unlimited, but now have the plans limited at about 22Gb and they slow your feed down.
I have had several times my router (their best router Netgear Nighthawk) lose connection with ATT's network. They only have chat Tech Support and you wait and wait for a tech support person to connect you back up.
I give them a thumbs down. They used to be very good dealing with.