I find it mildly amusing that Samsung employees in here are still trying to blame the provider for this problem, and a little bit annoying. You all need to get on the same page with this issue.
I have a factory unlocked SM-G955U1 with this same issue. My sim card is from T-Mobile.
I have noticed this problem also on my phone since Pie update and have been trying to search around to find what the problem was. I found this page first on the Samsung forums as I try to search here HOPEING to get a reliable answer from someone at Samsung. Apparently in this matter this is not the case. I do not have any of the system apps that Samsung employees have talked about in this thread as my phone is not with AT&T. This is a systemic BORKED problem with Samsung messing around with the stock Android software to make sure the Samsung apps get priority over Android apps that they try to replace, usually with poor results.
After doing some searching around on a MUCH more reliable website, I have seen several reports linking this problem with either the Samsung "adjusted" version of Pie, and/or also the security update that was released at the same time. I have seen reliable evidence that after the latest security update G950FXXU4DSDA/G950FXXU4DSD6 which has been rolled out in Germany, has apparently resolved the issue. I can only hope that aside from the several reports I have seen from people already that this seems to fix the problem, that this update also fixes the issue for US S8/S8+ and some of the Note 8 people who seem to be having this problem also.
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