Tested the Android 10 AOSP from phh and also the android 10 lineage os and they both worked great but they both had unreasonably high idle battery drain (over 200ma!!!! with screen off) which kind of negates the entire idea of this phone by turning the battery life into that of a normal smartphone so i do think we have to wait for some work to be done with those roms. I did however find out that i could recover from my bootloop caused by the twrp restore by taking the system.img out of the stock firmware files from the link posted earlier and flashing it in twrp.
Havoc OS 3.0 for me has weird phone bugs, in one install i could not make or get calls at all only data and sms and in another install a few days after i could make calls but not receive them. Lineage os works reliably and the gpu performance is great in games. I have diagnosed the screen off drain to be the WIFI which when turned off drops the screen off usage to 30MA. This is not a big deal for me as i don't have wifi and rarely use it but i do need calls to work reliably. Bluetooth does not cause drains.
Also i have the red text on top too now on the stock rom. I think it was caused by using "download + format all" in sp flash tool instead of "download only" which worked fine when i tried earlier. So to anyone reading this do not use the format option in sp flash tool just download when flashing stock rom or you get a permanent red chinese watermark on the top right over any display in the stock rom. This as was confirmed before does not do anything for custom roms which work fine. I will try to get the intercom app for the built in radio working soon on custom roms if i can figure out how to transfer it from the stock rom without causing a crash. It is the only thing keeping the 3WT from being fully usable in android 10.
A random fun thing i found is very doable with such a large battery is to keep it well within the center region of the state of charge which greatly decreases the amount of wear on the battery over a long time. So i have been using mine until 40 or 30% and then charging it from my laptop usb port over night and the slow charge usually gets it to around 70% by the time i wake up. This lets me use it for about 2 days comfortably until it gets to or below 40% again. It is not needed at all, especially with a new phone and such a large battery to take any steps to protect the long term battery life but i just thought it is pretty cool what you can do when you have 10000mah.
Just got my own Armor 3WT and can confirm the proximity sensor issue. After about a day it stops working and gets stuck on 0 distance which causes the in call screen to go black. Reboot fixes it as mentioned above. For me the built in firewall or "network manager" works as intended from a few short tests. My build number of the rom is "Armor_3WT_RF1_EEA_V01_20190919-1954". Bluetooth also seems to work fine however i have only tested it with an OBD scanner and not for audio or wireless headphones...
Meant to reply earlier but life has been too hectic lately!
Just checked my phone, build number is Armor_3W_RF1_EEA_V01_20191018-1432.
I have not had any issues with Bluetooth, be it audio (speakers, earphones), connecting with the head unit in my car, OBD dongle or solar charge controller. From my experience it is very stable in this regard.
However I am still having the issue with the proximity and light sensor. While it isn't the end of the world, it is annoying.... have you had any luck with finding a solution? (I haven't)
I've installed Havoc OS 3.0 using a dirty flash way. You need to flash stock firmware and finish google settings. Then you need to flash havoc system.img and install gapps (bitgapps in my case). This way working perfect for me. Additionally you can have a problem with IMEI's after download + format all. It could cause errors with data and sms. You should use SN writer tool which you can find on official ulefone firmware store in power 6 directory. I restored Tee key using that way but I didnt find the way to restore google key. I didnt spend a lot of time of thinking about it but I think it is possible to delete this red watermark via root and service manager. It is common problem on ulefone phones and some others. And about battery yes I do it same way, using it 2-3 days and then charging from usb over night.
Any solution to the proximity sensor issue? My armor 3w proximity sensor doesn't work at all. It stopped working within a day of owning the phone and since then i tried rebooting, reset to factory and its a no go. Maybe I should send ulefone an email and try to replace the phone under warranty?
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