Home Internet Gaming Connection Issue

So far no luck with a work around for me either. The fact that they've set all their units to NAT Type 3 makes gaming just about impossible. Most Home internet Services have their units NAT Types set at 2 (so in this case) T Mobiles NAT Type settings just won't speak with other online players. So I was simply going to open a port [think of it being a water outlet on the unit] to the gaming counsel ( that port would operate on Nat 2) and continue running Nat Type 3 on the Intire Unite/router and all other online devices such as Cell phones and what not that are connected outside of the open Nat 2 port....... Nat Type 3 has the highest security possible so when other Networks that run on Nat Type 2 or even Nat Type 1 it makes connecting to me/T mobiles routers impossible because the wave the box operates on blocks them due to the settings of the network being too strict and not allowing communication. And being that this is T-Mobile they won't change the settings to Nat Type 2 (moderate security) so still safe T mobile just to let the techs know *eye roll. is why I will also be dropping the service. The only issue I have with this whole thing is the fact that they don't let buyers/users know ahead of time that they run on high security settings and if you play online regardless of the device then you will not be able too have a session were you wont experience a time out or connection issue. I've been told I can connect another router to it, go into its settings and open the port or change the Nat settings of the 3rd party router, but honestly that's doing to much. Routers themselves range from 200 to 600 dollars and that's a gamble I'm not willing to take, unless somebody here has done this and actually went into the new routers settings and did as I mentioned? The whole point of the 3rd party router is to gain access to be able to change its settings so if you just did a plug and play type deal with an ethernet cable then please try and change the settings and get back to me if possible. It's kinda funny to me how T-Mobile can't change Nat settings for specific users. I understand they don't want their Networks to be hackable but if they can't figure out a work around then honestly they should get out of the (home internet) business and stick to what they know best (cell towers) this is almost like having strict and controlling parents, they will give you something but only if they have full control on how you use it lol. Except you're the one paying for it.