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You got the answer correctly and what I indicate is that it needs to be done from the app and the solution to do it remotely doesn't exists. And this is an common problem when trying to assist remotely. I have the same challenges with assisting elderly and people with other challenges.
As you haven't wrote any "use case" you get answers that tries to meet your questions. And when you wrote "cellular network" that indicate low bandwidth devices and thereof my answer.
