I have an S10 plus that is on the December 2020 security patch and hasn't updated to one ui 3 yet. I tried smart switch with my pc and checked software updates but it says my phone is up to date. Can anyone help?
"Unfortunately, according to SamMobile, this new update is only landing on Galaxy S10 Plus devices in Switzerland. However, that usually signifies that a wider rollout is only weeks or even days away."
unfortunately carriers are usually the main culprit in delayed updates when you're on a contract phone - as for the Global version its still in rollout for the S10+ but carriers are working on the S10 and S10E (EE are pretty quick whereas O2, 3 and Vodafone tend to be a bit slower)
What is your phone model? And your CSC? You can check on sammobile for firmware releases, if you have the G977B, one ui 3.0 has already been released by the looks of it for UK unbranded and UK vodafone, o2, EE and 3 mobile.