I had double tap to wake on a 950

Yesterday I used the WDRT to install the latest firmware on my unlocked 950 dual sim and then this morning reinstalled the latest Insider build. I restored from backup messages, phone history, apps and data. Double Tap to Wake, Bluetooth, Camera and Edge Browser all have worked flawlessly.
 
I bought 950 and 950XL
Both updated new version but only 950XL got double tap wake up phone, not for 950 . .... Why ???

Don't Judge a Book by Cover
 
Just got a new update after yesterdays latest Redstone build, it's called "MICROSOFTMGD Update for Windows Phone". If this is the new double-tap to wake firmware, I wasn't expecting this. My UK L950 was originally locked to o2, and still has the o2 splash screen when you switch it on, I currently use it with a UK THREE SIM. Who approves and allows firmware updates in this situation? o2 or Three, I'm not sure how this works.