Anyone else had issues with there lightening cable going in fine, then the charging being fine for a second then stopping charging and starting again at its own leisure, at some points I'm having to sit with the phone and very carefully pressing the home button so as to not disturb the position of the phone to check that it's charging, or move it so it is charging again, it's on a three contract that I started in December, could be a trip to the Genius Bar in Sheffield ??