I have a T-mobile Fibre gateway. The setup of deco is a nightmare. The Deco app requires internet login before local setup, which conflicts with setup mode (no internet). This makes initial installation confusing and unnecessarily difficult. It took me 3+hr to finally get it set up with step by step of instructions from AI. The official instructions is useless and might have got me on the wrong footing. I bought the deco from Amazon.