[Galaxy Note 3 Android Development] anthrax68:
I downloaded and installed the "official" 2020-01-01 build of hltetmo on my SM-N900T.

Flashed "lineage-16.0-20200101-nightly-hltetmo-signed.zip", then flashed my saved copy of "open_gapps-arm-9.0-nano-20190704.zip", then flashed Magisk v20.1, one right after the other on the same session. Wiped cache and Davik, and then booted to system. Still using the same TWRP v3.3.1-0 for SM-N900T, and baseband N900TUVUFQD2.

I have been testing for the last few days. Everything I normally use works so far - phone, texting, open camera, simple gallery, wifi, web browsing, checking emails (webmail via browser), RootChecker says it's rooted, some games I have all working, no problems rebooting into system or recovery or download, etc.

I normally don't use push notifications, but I decided to do some testing as I will detail below.

So far everything I normally use is working, except that I feel (subjectively) that the apps are draining the battery noticeably faster than the previous "official" build that I was using (2019-09-26). I will run it for 1 more week, but I I may end up going back to the 2019-09-26 build to see if there is indeed a higher battery drain with the 2020-01-01 build. I'm not sure yet.

Here's the detail of my "Push Notification" testing (using the 2020-01-01 build), with mixed results:

ABC13 Houston v7.8.1:

Turned on "Push Notifications" for breaking local news. Notifications popup periodically, even when phone is locked. Subjectively, it seems to be working normally.

United Airlines v3.0.26:

On Friday I chose 5 early flights, between 7:00am to 12:00pm, and turned on Push Notifications for those 5 flights. Did not get the notifications at all (even though the flights were done by 1 or 2 pm), until suddenly at around 7pm I received all the notifications for all 5 flights, including departure, delays, and arrivals.

Today (Sunday) I chose 4 early flights and turned on push notifications for those 4 flights. Did not get any notifications at all (flights were all completed before 2pm), until around 5pm today I went to the app, and suddenly 2 notifications for flight arrival for 2 of the flights popped up. No notifications for the other flights, nor the departures (and 1 delay) for the 2 flights that I got the arrival notification.

EDIT: This morning (Monday) overnight I received arrival notifications for the 2 other flights for which I did not get notifications on Sunday. Weird. Really not sure what the issue is with push notifications, and whether the issue is with the carrier, or the notification network provider, or with the custom rom.

Gmail v2019.11.21.283644823:

I turned on push notifications for "all" emails (default is "highly important" or something like that).

On Friday I sent periodic test emails throughout the day from my regular home email as well as texted test emails to the gmail email address. Nothing, did not receive any notifications but the phone did not reboot or crash.

On Saturday around 4pm I sent 10 test emails (some from my home email, some by texting from my phone to the gmail address), and 1.5 hours later, I got popup notifications for all 10 emails from the Gmail app, even with the phone locked.

Keep in mind I'm still carrier-locked, using T-Mobile on my SM-N900T. I don't really know how push notifications work, but my guess is that T-Mobile is not reliable when it comes to Push Notifications, or the different notification servers used by those apps are unreliable.

In any case, during all this in the last few days, my phone did not reboot or crash at all, not even once.