Perhaps just me but I will never use a secondary mobile or as I now call it, a pPhone (new brand, I just created it; Apple, watch your back
) with content unlocked, or I would be tempted to arrange for a hasty plan B if the primary arrangement falls through for some reason.
I just have 2 or 3 phone numbers of safe (or at least extensively pre-researched) alternative favourites on my phone, within an acceptable radius of said first WG and then call them on the spot, if need be. Also, this way I don't need to give my CC details or have to show up at a shop and ask to remove the content. Don't want AW, UKP or any other of the likes on my mobile
, but that's just me.
I have an old smartphone and use an EE £5 monthly voucher (you can buy on any shop, cash), gives me 50 min, 250 texts and 150MB (enough for a few WhatsApp calls or texts), for me that's more than enough, I don't need to spend ages on the phone with a WG jotting down what she wants me to take home for dinner, unless we're having a food/sploshing romp on the side
, and that doesn't happen that often.