However, I'm occasionally finding that however carefully I dial I get a wrong number.
Knowing the possibility of a problem. I'm VERY careful, hasn't happened very often, but enough to be irritating, last week I tried to 'phone the now widow of a good friend recently deceased and kept getting the same wrong number, gave up an used the direct dialling system - at great expense, but he had been a good friend for many years - and got staight through. 'tis a puzzlement.