Ticketing Questions

On the way back from the game but have a question on tickets! Hoping someone here will have some knowledge on it all. I'll start with some context - we have 3 season tickets between us. My own (Adult) and two concession tickets for Over 65s. I travel from far afield to the game which means making midweek matches is difficult. The others aren't able to make occasional games due to other commitments. That means we often share our tickets, but due to the fact they're locked on our phones it makes things complicated. My idea is that we use an older phone to keep all 3 tickets on, keep it on WiFi during the week as I don't believe it needs a SIM card / internet connection when entering - provided the passes are updated and on the phone. If that works, we can pass the phone to whomever we wish and they can come with us and use the spare ticket to the game. However, and here is the problem - the 2 concession tickers for the older gents could potentially be flagged if one of the younger chaps in our group uses it. How on earth do you go about getting your ticket swapped from a concession into an adult ticket etc? One of our group said that they attempted to transfer their ticket to a forever everton member (part of their friends and family) and he was unable to transfer it to him, he just got an error message. If anyone has any ideas on what we do, I'd really appreciate it! NSNO (apart from the shit ticketing system)