FP4.SP2J.B.086 was announced on 21 August but there seem to be at least two variants distributed to different network operators. The one I received has a different number at the end. Your network operator may not have received theirs yet, this often happens because adjustments need to be made.
Check out the topic that yvmuell already pointed to.
If you indicate your country and network operator maybe somebody with the same operator will confirm. I’m in France with Free.