Not sure if anyone else is experiencing random delays in notifications.
I.E. I'm at home, no notifications come through on the phone (or text messages) and the moment I get off WiFi they come through en mass. It also happens with some cell towers, when I hit a new cell tower, notifications come through en mass. This seems to rule out the network but rather the software is the issue.
yea... about that. tried to. they told me to take it to UbreakIfix so they can "solve" the problem...which is clearly an OS Issue. I've figured out that it's related to the existing issue many have reported about post reboot the phone can't connect to cell networks...and rebooting again fixes it...stating it clearly is an OS issue and even commenting that a factory reset was done lead to them saying "Samsung Repair Centers can fix the software issue" which...they can't...since it's a firmware issue that others have clearly reported.
TMB told me my phone wasn't receiving all the paging notifications, even on LTE. I did a bit more exploration and found that the APN is set to only use IPv6 which goes against TMBs recommendations for APN's...I created a new one with IPv4 and IPv6 and it seems to have helped so far.
Many threads on this issue on various forums. Really annoying such high end phones (s20, s21, note 20) are experiencing this issue. Samsung has no answer for this, keep telling people to get their phone repaired/serviced which doesn't do anything. Seems to be the really aggressive power management/battery saving on Android 10+ and/or One UI. Even after disabling all these features still only receive notifications when screen comes on. So over this nonsense lack of care by samsung to fix this. Just google "samsung delayed notifications" and see the threads that come up...
This solution worked for me, hope it helps someone else...
I just got the Galaxy S21 (not the plus or Ultra). I was experiencing the exact same issues stated above. After turning off "Optimize battery usage" for the specific app having issues, my notifications for that app have not been delayed. Unfortunately I have not figured out how to fix it for everything on the phone but I don't necessarily need it fixed for every app in the phone either. Mostly just text messages, emails and chat apps.
Steps:
1. Open settings
2. Open Apps ( 6th from the bottom of the list on my phone)
3. Push the 3 dots in the upper right corner and select Special access
4. Select Optimize battery usage (2nd from the top of the list)
5. Push the the little down arrow next to "Apps not optimized" and select all
6. Find the app(s) in the list that is experiencing notification delays and switch the slider to off (it should slide from right to left)
7. All done, resume enjoying your technology.
Like I said, following these steps for each of the apps that was experiencing notification delays fixed the issue for me, this may increase battery usage a little but I haven't noticed a difference yet and it would be worth it for me anyway.
Anyone else getting text messages like 8 hours later then when they are sent? I never send this happen before on any phone. So far it only happens with my group texts from work. I know that because I am off work sleep and getting messages about work when we long close.
Are you power cycling your phone every day? If not, you need to start doing that. Even if it's just for a second or so. Your phone needs to update with the towers and it can cause a lot of problems of you don't power cycle!
