I'm going to switch my family back to Tmobile today, please help me out!

Ok, so looking for a little bit of inside advice here.

I've gotten sick of Helium so I'm going to switch back to Tmobile after being gone for several years. What I need to do is move our 3 lines to Tmobile and I wanna upgrade my wifes phone and my phone. My daughter has a brand new iPhone so she doesn't need to upgrade anything. But I wanna get an S26 ultra and my wife wants to get an S26 plus. We have an s10 and my s20 ultra to trade in. I was looking at the plans and from experience I know that the actual bill is gonna look a lot more than what is basically on paper. So where is my best value? I'm sure they want me to do the experience beyond plan. I was looking at the better value and experience more plans.

Is there any hidden tips I should know? I want to avoid any unnecessary sales pressure by knowing what I want going in.

thank you for your help in advance!