Answer
(Fatwa: 2007/B=398-TB=1432)
It is not so, if the picture is behind, in front or on right, left, up or down of namazi (musalli) then salah is makrooh in this case. If the mobile is switched off and there is no picture visible on the screen then it is not makrooh.
(2) Regarding the photography, it is mentioned in hadith:
أشد الناس عذابا عند الله المصورون . (بخارى و مسلم)
It means those who take pictures shall get severe punishment on the Day of Judgment. This one hadith is enough for reference.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband