Sorry to read of your 'will not get better' situation. I did start writing something here yesterday about hoping you can sort things out as it is a long distance between there and UK, so any arrangements will hopefully be lasting.
As for phones - I have a cheap Siemens on Virgin Mobile which can do the alarm thing while calls and texts are incapacitated by me "switching off" the phone (clearly they're never off while there's battery life, else the button switching them on would not work).
Have tried suggesting others get cheap phones that can handle alarms without waking them for calls and texts, but normally get a "cat's bum" response, so I'm only "well behaved" after a few individuals expressed their annoyance.
I have to laugh about one situation, however, where I had been working like stink at a radio station - Tuesday 0900 to Thursday 2200 with only breaks for some food and coffee, and then Friday 0900 to Sunday 1000 (and then a 2+ hour train journey home).
Rang my "boss" at about 2:30 on the Sunday morning, to give a status report, fully expecting (like any sane person) he would have his phone switched off (this was 10+ years ago, so they were usually on charge at night), but instead woke him, and his wife, at 03:30 as they were on their last day of a visit to Paris (lucky ones).
I felt a little more joy that I'd woken him, when I considered how he was "living it up" while I was doing the hard slog, and he would probably pay me only a portion of the fee charged for the work. I think I managed to push him to around 90% - a bit over 2K (!)