My friend who is on the s8 has already got the december security update whilst I'm using the s9 and I havnt got an update still and even when I check manually it say latest update already installed and it say security patch august 2018
Wow your security patch is behind !
As far as I'm aware security patches and software updates are sent out in waves as not to crash the servers and is dependant on country, build and serial numbers and if the phone is branded which means network supplied or unbranded which is supplied directly by Samsung.
With branded Samsung phones it can be that the network stops Samsung from sending out the updates until they have tested the firmware etc beforehand and then allow Samsung to send it out when they are happy that nothing clashes with their network and installed software on the phone.
Also some have bought their phones privately from a seller or from another country and that then can delay updates as the phone updates are dependant on being sent from that country of origin.
As neither the Networks or Samsung will talk about timeframes for software releases it is best practice to periodically check the phones software update section.
Some people decide to install a custom rom to circumvent having to wait for the update but this can have negative effects too so a person considering this Avenue needs to first learn about the pro's and con's. A good site is xdadevelopers.
Personally I'd suggest to not go down this route and anyone that does then does so at their own risk.
I hope you get your update soon.
Current Phone ~
Samsung Note 20 Ultra 5G SM-9820 _256Gb SnapDragon 865+
Samsung One Ui 2.5/ Android 10.
Welcome to the Community! :smileyhappy: