What is in the newest 4.0.0 beta build for the Flint?
I see there are now 2 files, one for uboot and one for the update from Admin Panel?
This firmware appears to be 20% larger in file size?
What are the changes, is there a change log?
Is this already stable enough to use, what are the benefits of using this 4.0.0 beta firmware now?
Itās stable enough to use the 4.0 firmware.
When you want to switch firmware from 3.x to 4.0 beta, you need to download the Uboot one to upgrade.
Interesting,
How do you get the Flint into Uboot mode to upload?
I tried pressing the āsynchā button while booting with a LAN cable plugged in (LAN nearest the WAN), it just booted normally into th current firmware?
According to debricking article, should flash 3 times then LED goes white.
Simon
You need to remove the power, hold down the reset button with a pin or toothpick and insert the power plug then the correct flashing will occur and you should be in uboot mode.
Lol, Stupi me! Use the reset buttton not the synch button. Did not spot it, as I assumed the ābuttonā was the button to use.
What does the synch button actually do.
Simon
Sync button does nothing. Was going to be for mesh setup but functionality was dropped at release.
LOL, you press the WRONG button 
The AX1800 mesh support discussion thread: (thatās where I found the sync button was mentioned for the first time)
Flint GL-AX1800 Mesh Setup - GL.iNet Routers Technical Support - GL.iNet (gl-inet.com)
Where is the change log?
and speaking of uboot,ā¦ I was hoping for some sort of uboot backup (firmware+user config) before trying out 4.xx :: so if i donāt like it, i execute a file and previous firmware and config that worked, restored instantly. If such feature does not exist, IT Should!
Well, as for the previous firmware, I believe if you want to go from fw 4 to 3 you have to use the stable firmware 3 but upload it via uboot, not via webinterface.
As for config backup, I think it is only via OpenWRT luci, but not recommended I think.
Itās basically there. You need the V3 image, and make a backup in LuCi (you can select what to save).
Flash firmware V3, flash backup in LuCi, doneš¤·āāļø
OpenWRT 21ās changelog say " TLS and HTTPS support included by default" among other things mentioned here so does it mean that Flint can be accessed via HTTPS? (along with others like Adguard etc?)
Can anyone who installed version4 test this? Iām anxiously waiting for adguard to filter https connections through above change 
Edit: speaking of backups,ā¦ I HATE LuCi 
after saving things in LuCi, I was horrified to see many of other settings messed up in standard UI (which only got fixed after uBoot hard reset)
When people here say,ā¦ āyou can always use LuCi and get that doneā I read is double meaning āyou can always hit a hammer 
on your Flintā 
Kernel 4.4.60 (OpenWrt 21.02-SNAPSHOT, r16273+113-378769b555) and still IPv6 not working. At least I can now use material-theme for LuCI. With all these canāt resolve address errors the flint still isnāt ready to be the primary router connected to the fibre modem. I still prefer old but well supported WiFi 5 routers.
I could not download the gre protocol for Flint.
I sort of expected this as the feed is opewrt snapshot, where as the AXT-1800 has some gl-inet respositories. I suspect the focus is on get Slate AXT 4 out the door and then flint.
From my quick test for normal routing it seems OK, anything too fancy and you may have package dependency problems. Not ready yet, but I will be loving the flint when version 4 becomes stable!
Until then AXT-1800 seems the best GL.inet router.
Simon