Nokia Mobile has started the rollout of monthly updates to the Nokia 7 Plus. After a slow rollout of November update (which actually started rolling in December), the Nokia 7 Plus is now one of the first to receive the December update.
Like a typical security patch release, the December 2018 security patch update for Nokia 7 Plus is relatively small at 98.6MB.
Users are reporting a widespread rollout, suggesting that many regions are receiving it simultaneously. However, some regions might still take a while to receive the update.