Re: Not receiving Gmail push notifications on Galaxy S6
Well I've been using my Note 5 for four days and some change now. I've tweaked about every setting in the device, moreso just exploring and getting the battery consumption where I want it than worrying about my push notifications. After a while, I noticed my push notifications seemed to get more frequent. At one point when I was using another device and not my Note, it started notifying me when I didn't necessarily want it to and actually had to mute notifications! Long story short I'm not 100% sure what exactly I did to get my push notifications working..
One thing I did to troubleshoot though is something I saw suggested elsewhere. The process was as follows:
1. Log out of hangouts
2. Uninstall the updates for Hangouts to revert to the original factory version
3. Clear the cache for Hangouts
4. Reboot
5. Log back into Hangouts BEFORE updating
6. Log back into Hangouts and set it up the way I want
7. Update Hangouts
After this, my push notifications seemed to be at the very least less flaky. It's almost to the point now where I don't feel the need to check my phone to see if I missed anything because it simply hasn't happened yet, Hangouts or Gmail.
I apologize for those primarily affected by the email issue as I know this probably doesn't help you as much, but my email push notifications were significantly delayed if not almost nonexistent before and they are going through just fine now. However, I do have somewhat of a workaround that I was using since my Gmail wasn't working at one point either. I just used the pre-installed email client, which has an option to retrieve instantly (also one for 15 minutes) which seemed to work just fine. Alongside that I had my Gmail app also installed. Between the two, I don't think I missed any emails. I'm actually considering dropping my Gmail out of the default mailbox now simply because I think Gmail is giving me proper notification (finally!)
I think the only thing I did NOT do on my phone to try to solve the problems I had was reset to factory. I couldn't bring myself to do that, especially since I had just gotten the phone last week! I think the closest I got to figuring out exactly what it was still had something to do with the WiFi settings.
Here are some other steps that I took to troubleshoot this problem and unfortunately a couple others (mainly battery life). I apologize as this is a bit off topic but they were things that were changed regardless. Hopefully they will help someone:
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Under Wifi > More > Smart network switch (I turned this OFF, from what I hear this is what helps control the VoIP transition to Cellular. This makes no difference to me)
Under Mobile Networks > Mobile Data > Enhanced 4G LTE services (I also turned this OFF. I'm not sure how much this will have to do with Notifications but I did find this to be a battery hog)
The last thing I did was actually not something with my device. Since this seemed to be more affected by WiFi, I made IPv6 local link only on my home router. Once again I'm not sure if this actually helped the issue or not but it was changed none-the-less. I did see several people mention IPv6 which is why I did this.
At one point during troubleshooting I did reset all of my connection settings which is under More connection settings. I think this was probably midway through my troubleshooting. I don't think it helped much at the time but may have helped ultimately.
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I apologize again, I know my troubleshooting isn't in the proper order. I didn't document anything as I went along, this was all just from memory. Ultimately I'm holding onto hope that Marshmallow will solve more problems than it could (possibly) create! For now though, my problems seem to be fixed.