initially i thought the dirt particles inside the iphone 5 camera prevented the focus for getting to work properly, but after an initial genius bar date, it was obvious, the camera has a technical problem. the kind offer to get a out of guarantee special priced phone was not an option.
smooth and perfect thanks to the advices given by the guide. I took about 2 hours to finish the job, three cigarettes and two coffees. perfect wake up job. It was a pleasure to see the high tec precission of fabrication. respect for this layout.
After the battery is removed you have to do a reset of date and time, otherwise the network is not working. so:
set date and time, restart and voila everything back online.