BUT: Is my "Sony Xperia P" in the flat position inserted (fourth image in the article description), so it is shielded on the back to a large extent from the stand. The reception falls in this position immediately to the basement (see to the vanishing reception bar in the display) and most calls do not arrive!
And since we know that it is in this the dreaded "death grip" is, namely, in which the phone is touched during an established connection in the bottom half and thus restricted in receiving "Sony Xperia P" -owner yes, we also have equal to the explanation for this problem!