I'd have locked up all the payment options, so if someone got into said device, there's nothing to steal.
I say the following not to be argumentative, but because I have "been there, done that" twice now. This is well-nigh impossible to accomplish unless you have power of attorney for the individual in question and it's a durable power of attorney where what the court considers competency to make decisions is impaired, and that eventuality is mentioned in the PoA.
For everyone here who still has a parent who's living, and who believes there may come a day when they need to care for them, please discuss having a durable general power of attorney drawn up that gives very broad powers for both business/financial matters and medical matters. And that's whether or not it's you that is designated as PoA. If you have dear friends who have no other relatives or are estranged from their relatives that you truly wish to help should the need arise, think about volunteering to be their PoA if they want that. It's too late to do anything "after the fact." This instrument must be in place pre-need, and you hope that you never do need it. And unlike what some soap operas and other dramas have depicted with regard to PoA, if you attempt to exercise it and do something against the wishes of the principal, there can be some very, very substantial consequences for doing so. If the person is conscious and competent then a PoA should never, ever come into play unless the principal instructs you to do something for them due to their inability to physically do so.
This is the only way that banks, hospitals, financial institutions, care facilities, and the list goes on and on are obligated to follow your wishes in regard to the person you're PoA for. Otherwise, they will do whatever they need to do to cover their own posteriors, which is often at direct variance with what the individual now unable to make decisions for themselves would have wanted.
I am eternally grateful that I had this discussion with both of my parents years before any need occurred, and that I volunteered to be PoA for a very dear friend who had only a single living relative who lives over 10 hours away by car and could never have handled end of life decisions with any ease when they were required.