Question about the 4 for $25 plan

So my brother went online and spoke to a customer service rep about switching from Sprint and getting the 4 lines for $25 plan. This plan I believe is supposed to be $25 for the first two lines and the third is free. After a few days of getting set up, it’s brought to my knowledge that the first bill will be $230. Now I’d already been a bit skeptical to go to a store in-person because in the past we’d felt cheated out and paying more over the years because plans get changed and back fees added up (that’s on our end so I get it) and we (my family) just haven’t had good experiences. But having read enough in this sub I still feel like it’s....not a good price? Perhaps it is the phones we got but I want some feedback on what I can do to understand this better. We supposedly switched carriers to save more and we are technically, but not by much. Any insight would be greatly appreciated. Thank you!