I think this is a great choice, but it's more important for you to feel good about it. What I can do to help answer question about this <product/service> that might help you make a choice that's right for you?   ( CX WANT MORE INFO )

One of the awesome things about T-Mobile is that we do offer something for everyone and sometimes having this many options can make it difficult to make a decision. As your expert, I'd like to help make this easier for you so let me ask this - what would you say the two most important device feature/service/factors are to you?    ( THERE IS TOO MANY OPTIONS )

I hear you! The out-of-pocket cost can vary, and I want to be sure we review your options so that we can find a solution that you feel great about! We have a lot of models and variant that can be easier on your budget.   ( PRICE CONCERNS )

I totally get needing to check with your spouse/child/family, it's the same way in my house. What I want to make sure is that you don't miss out on this deal/promo. How about we get this order set up now so as not to delay shipping and you can discuss with them? Then, if they decide that don't want it, the good news is you have 20 days from the date you received it to return it. How does that sounds?   ( CX NEED TO ASK SIGNIFICANT OTHER OR FAMILY MEMBER)

I know you feel going to the store provides better option, but you can avoid the traffic and possible a crowded store and wait times. Plus, sometimes they don't have what you're looking for in stock so they would need to place an order same as I can do for your right now. Why not avoid that hassle and order it with me today?  ( CX WANTS TO BUY IN STORE)

I can certainly appreciate the desire to get the get value for your buck especially when you're taking advantage of some incredible offers like this one. I want to assure you that by completing this one-time transaction today with the connection charge, you will have the peace of mind knowing that your order is being processed flawlessly, including that promotion that we discussed. Our goal is to make this as easy as possible for you today.   ( UPGRADE/DCC FEE CONCERN)