IPhone X not receiving iOS 11.1.2 update

Ahhh well THAT explains it then.. You did not receive 11.1.2 as that would be a downgrade.

Only Apple know when IOS 11.2 will is likely to be released, but it may well be several weeks away.

Public beta software releases are intended for specific technical audiences and are not considered stable for use by ordinary end-users. As such, the upgrade or exit procedures to/within/from the beta program are not as well streamlined, or within the normal support structure.

Not good news I'm afraid. The 'way out' of the beta program is to restore your device from scratch using a backup taken before installing a beta version of IOS.

See: How to install or uninstall iOS beta software - Apple Support

Maybe someone else will can advise whether or not, if you wait long enough you will drop back into the release track when IOS 11.2 eventually launches. You certainly will not receive any 11.1.x updates whilst in this state. I can think of some good reasons why they might make it such that release version would not install from a beta - the main one being that as the beta is test software, it is considered buggy and might have corrupted data or settings on the device. Installing 'stable' software over suspect data/settings would leave your device in an unsupportable state.

In the article linked to above, Select "Uninstall IOS beta" - to view the appropriate instructions.

Carefully follow the instructions in that section of the article.

Unfortunately - that involves re-installing a fresh copy of IOS in a way that wipes all settings and contents of your phone (but it sounds as if you have wiped your conetent already)

Afterwards, if you have a backup from before installing the beta, you could restore that if you so wish.

You could try doing an update through iTunes, with the phone connected to your computer with a Lightning cable.

Update the iOS on your iPhone, iPad, or iPod touch - Apple Support

Hi

Try update later over your wifi.

Go to i books download ios 11 user guide &iPhone X guide both are free.

Cheers

Brian 🇬-1F1E7;