A dead router or a locked tablet becomes a family emergency when only one sibling knows where the login lives and whose card pays the bill. The fix is not a better device. It is a short list of who owns each piece and who keeps it running.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Inventory the pieces
List every connected item in Mom's home: the phone line and plan, the internet account, the modem and router, the tablet, the video call app, and any smart speaker or doorbell camera. Mark which ones Mom uses daily and which ones only a visitor touches. The daily ones need the fastest fix.
Name the account holder and the bill payer
For each service, write the account holder's name, the card or bank account that pays, and the email address that receives notices. Whoever is on the account can usually cancel, change, or upgrade it, so that name matters. Whoever pays the bill should be recorded as a line item in the family tally, and changes should go through the account holder.
Assign the upkeep
Decide who installs device updates, who restarts the router after an outage, who charges the tablet, and who checks the video app before a scheduled call. Put a short monthly check on the shared calendar with a name beside it. Upkeep done by a sibling who lives across town counts as labor, so note it the same way you would note a drive.
Store the logins where more than one trusted person can reach them
Keep usernames and passwords in a password manager or a sealed page that at least two trusted people can open. Do not send passwords through group texts, and do not write them on a sticky note on the router. Record the internet provider's support number, the account number, and the router reset steps on the same sheet.
Decide the outage route
Write down who calls the provider first, who approves a visit fee, and how long the family waits before escalating. Ask the provider in writing what a service visit costs and what it covers, and record the answer. The point is that nobody has to guess during the outage.
Check who has authority
Being listed on a bill or knowing a password does not by itself give anyone authority over Mom's accounts. If you think someone has been given that authority, check the paperwork with a qualified attorney before you act on it. The local help page is a starting point for finding one.