There are plenty of repair shops for most smartphones available, with varying degrees of “officialness”, ranging from apple stores to backrooms with a workbench and someone with heavy slavic accent taking 20 euros to change a broken display.
Of course this applies mostly to urban areas, elsewhere there will be fewer.
But the speed doesn’t really matter, so it shouldn’t be very energy intensive at all. Just gather up some junk, launch it at the sun with an expendable thruster, and be done with it. If it travels at a couple hundred kph, or even less is completely irrelevant. Let it take a couple hundred years to get there, it is supposed to burn up anyway no? And if it collides or is otherwise destroyed en route during that time won’t matter much either.