Tmobile Gateway

[jimkat]

Do I need to unplug my At&T indoor 5g antenna while using Tmobile Gateway internet ?

 

[Dannydet]

Yes

 

[svim]

If someone in your household is using AT&T as their cellular service carrier than leave your AT&T indoor 5G antenna as is. But if everyone is using T-Mobile as their carrier than yes, there would be no point in having that antenna active.

Keep in mind that AT&T and T-Mobile are two different carriers and that each use their own different cellular networks so there isn't a conflict involved. Depending on where you reside where all being immersed with wireless cellular signals from different carriers, it's only a matter of which one we've chosen to have an active account with that we've chosen to use.
Plus there's a big difference between your AT&T antenna and your T-Mobile Gateway -- the former is taking in an AT&T cellular signal and emitting a boosted, stronger cellular signal for your household; the latter is taking in T-Mobile's cellular signal and emitting a converted WiFi signal to your household. Cellular and WiFi may both be wireless signals but they are different from each and are not interchangeable.