Last year, my husband and I got new phones. They are under contract/"locked." So I cannot take advantage of eSIMs. I'm considering taking my old phone and buying a physical SIM card at Vodaphone in London. I'll be in the UK for 10 days so I don't need a lot of GB. I don't really want to take the old phone because it's heavy and I'm bringing my new phone for US use as well as photography while on vacation. The camera in it is excellent, better than my Panasonic that I bought in 2016, and better than the old phone.
Is this the best way to go about doing this, or is there another possibly easier way?
Thanks!