yashsingh1/xdaforums huggingface dataset:
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] kevinmcmurtrie:
It might be broken. I tried building it myself and everything crashes when the UI should come up.

Update: I got a new build to work and the speakers are almost working correctly. The EQ is a bit off and there's no dynamic range compression. The hard part is that the Setup Wizard's panels are in the wrong order so the phone is very difficult to get working.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] FadeFx:
But the setup wizzard is a general thing and not device specific, so shouldnt all builds have that issue?

Gesendet von meinem ZTE A2017G mit Tapatalk
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] EasyTiger6x13:
I've searched the forums, tried reinstalling the ROM from scratch, clean wipe, and formatting, I can't find the answer on how to fix the storage bug. Ya know, the really old one that shows that You have -7.6 GB used of 39 GB. Anyone know the fix to this? Flashed LOS and RR completely clean wipes with Internal storage wipe and I have the same problem. Thank you in advance.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] FadeFx:
Afaik you can workarround that by rebooting without an sdcard and then insert sd while running.

Gesendet von meinem ZTE A2017G mit Tapatalk
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] EasyTiger6x13:
Unfortunately it's the internal storage that I'm having the issue with, however I tried your idea and to no avail.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] troy5890:
I have a question, do we have to flash the universal bootloader if we're coming from stock 7.1.1 with an unlocked bootloader?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] bluestudy:
Should be good. You've already got the bootloader and modem from the latest stock firmware.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] troy5890:
Thanks for answering, I appreciate it. I'll give it a try tomorrow
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] jawz101:
what is the latest today?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] bluestudy:
I made the assumption that he was on the U version, and b19 was the latest update that we got. But anything on stock 7.1.1 should have come with a compatible bootloader and modem.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] sToRm1nG:
If you have an A2017G it is important that you come from V1.2.0B01 since the TrustZone of B02 is not whitelisted (meaning you will end up getting an error when try to flash LOS).
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
Build 0424 is up: https://lineageos.mirrorhub.io/full/axon7/20170424/lineage-14.1-20170424-nightly-axon7-signed.zip

the website ssl certificate is expired tho
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] troy5890:
Yup, your assumption is correct indeed
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] SantiHurtado:
Hey guys, I wanna know if anybody is having this issue with Adaway. Everytime I apply hosts and restart, Adaway starts disabled. I tried mounting partition as rw but it didn't help.

If there is any other ad blocker that you suggest and it works do tell.

Thanks in advance!
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] nupi:
Dirty flashed it, works perfectly
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] killer23d:
Did you disable system write protect?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] SantiHurtado:
I haven't, don't know how to do that. Any help you can send me?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] BritSwedeGuy:
The speaker sound seems pretty good in this week's nightly (20170424) without having to flash the audio fix.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
I merged the patch for last week but we all know that nightly failed enjoy :)
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Motogeek:
The merged patch is equalivent to patch 4.2?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Not yet, those changes aren't just ready. That was something I asked draken to send out to test something I have on Gerrit. It basically ships the stock volume curves as suggested by the anonymous dev. The volume on voice speaker is still a bit too low for me. All these volume tables do is prevent the audio from getting distorted when you increase the volume.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ((RayDar)):
That's OK. We have learned that the "nightly" zip files in the "weekly" folder are delivered "monthly". :silly:
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] shifuharris:
First let me say awesome work [MENTION=4911249]Unjustified Dev[/MENTION] and everyone else who is working on this ROM.

I've been rocking this build since it was released and just want to provide some feedback.

Installation:

Followed instructions in original post exactly after a full wipe of cache, dalvik, system and storage. Installation went fine even though it did downgrade my TWRP from 3.0.3 to 3.0.2. Despite that, system booted fine and setup completed fine.

Issues:

Audio through speakers is still sightly distorted at high volumes. It is far better than on the CM builds bit still a little off at higher levels. It is flawless through headphone and Bluetooth though.

GPS takes a minute or so to get a lock and get oriented correctly. Seems to work fine after that though.

That is it. Other than those two things, this ROM is awesome so far! Really smooth. Will keep playing with various features and see if I can locate anything else to report.

Thanks again! Awesome work.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] CobraKolibry:
Just unlocked my A2017G on B10, flashed bootstack, rom, gapps. Everything's went fine, I love it so far, thanks a lot [MENTION=4911249]Unjustified Dev[/MENTION]

One issue I'm facing, and noone mentioned before is, that when i take HDR shots with Snap, it takes 2 pictures without processing them at all. Is it just me, or a known thing?

Also not trying to be greedy, but any words on what can we expect in the camera department in the future? Like with a build prop entry you could enable camera API 2 (according to a Z-Community thread), and it makes it pass compatibility test, but crashes apps that rely on it. Would that need the stock's proprietary driver/lib/thing, or looks possible to implement sometime? The camera's pretty much my only reason for stock, but i dont like MiFavor at all
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MiMtnBiker:
I just went through the process of installing this. Followed instructions and all went well. However, I noticed that my WiFi MAC address changed. Any reason as to why this happened?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Twiggy000b:
Noticed screen rotation doesn't work
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] shia786:
It works for me
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] doyou37:
samesies

---------- Post added at 04:07 PM ---------- Previous post was at 04:07 PM ----------

I am thoroughly impressed. Excellent battery life, no issues other than speaker audio. BIG THUMBS UP!
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
ZTE added changes to the wlan driver which we do not have. The driver we use is from upstream qualcomm and randomly generates one.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MiMtnBiker:
OK, good to know. I thought I may have effed up somewhere. Also, thank you all for the great work!
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Whenever we receive their modifications, it should restore the untouched mac address from persist/wifimac.dat or wifimac2.dat
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MaxRink:
tbf, from a privacy PoV i always prefer random MACs that regenerate every so often, as tracking users is extremely easy due to broadcasts for APs from the phone.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Guido83:
so nice...
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] TEXASMADE1978:
Yes it works for multiple people, even myself. This post helped me so hopefully this helps you get it working.:fingers-crossed:
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] jawz101:
Is anyone else getting crashes when pairing Bluetooth devices? I can pair one fine but I've got a watch, 2 stereos, speaker, headphones, heart rate chest strap... The phone locks up on the pairing screen when I start to look for any additional pairings. I'm also eventually buying an ANT+ device but I've never actually heard of anyone else talk about them.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ((RayDar)):
Bluetooth pairing issues?

This would be a deal-breaker for me. I use a ton of Bluetooth devices. I need to know that it can pair with multiple BT device before I can risk trying it. Can someone verify whether paring with more than one device works properly?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] TEEDLE_21:
Big thanks to [MENTION=4911249]Unjustified Dev[/MENTION], [MENTION=3044858]DrakenFX[/MENTION], and [MENTION=4126377]tdm[/MENTION] on this one.

I followed the following procedure on a A2017U. I dirty-flashed over the Lineage 13.1 that someone had posted in the CM13 thread and had B29 bootstack.

Flashed N bootloader and modem provided

Flashed latest TWRP img using recovery option "Install Image"

Reboot back into recovery

Flash Lineage 14.1 and GApps

First boot took maybe 5 min, smooth sailing from there.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] DrakenFX:
Updated A2017U & A2017 G Stacks,

* Remove " recovery.img " (TWRP 3.0.2).

* Remove Installation line from Script.

NEW Stack names :

*A2017U_Nougat_Bootloader+ModemFix2.zip

*A2017G_Nougat_Bootloader+ModemFix2.zip

Hope that'll kill any issues mention by several user and use latest TWRP as default recovery.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Kleva94:
Yes, it worked, thank you so much.:)
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Twiggy000b:
I can verify that the new twrp (3.0.4) with system formatted at f2fs works with lineage!

Also reflashed and rotation is working. Had different things happen when i flash.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Catalana:
I am somewhat excited about the progress being made, but not quite ready to flash LineageOS. I know this is BETA, but what concerns me is little details.

In the top post on page 1 are the very basic instructions and download links, but it says at the bottom that the post was "Created 01-27-2017", then "Last Updated 01-26-2017".

The link for TWRP shows version 3.0.3-1 & version 3.0.3-0, so I assume that either TWRP can be installed. I also read that flashing the bootstack while on A2017U B29 will brick the device.

Just what would I have to do for a smooth installation (still on ZTE stock B29 unrooted), i.e., do I need to wipe/reset my phone, go back to B20, unlock and root, install bootstack...etc.

I always try to read the entire thread, then compare to the original post and links, but sometimes the changes being made are not transparent. I wish there was a more concise step by step instruction set that

also gets updated to reflect the changes. Trying to keep track of all the various methods presented so far regarding the Axon 7 is tough. Maybe this 'Unofficial Beta LineageOS' installation is meant for the cogniscenti,

so I'll wait a little longer. I hope my post is not taken as negative criticism.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] jawz101:
Further details on the Bluetooth pairing. I can pair my BTLE heart rate device in my Running app. Same with my Pebble and its app. Any pairings managed from the actual Android Bluetooth settings screen are not possible because when I hit refresh devices the device locks up as it's scanning and sees another device (I think.) So, some Bluetooth devices you have might work depending on if they can pair through a 3rd party app.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Snaptraks:
Thank you for your hard work! I'm running LOS since the first Official build and I am 100% satisfied with everything.

Well this time we only had to wait two weeks! It's an improvement!
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] jimbo77:
[MENTION=4911249]Unjustified Dev[/MENTION] what are the chances of getting the screen cast fix you mentioned in the hangouts group?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Is it not working yet? I'm like 5 nighties behind
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Narada2XK:
They should really be renamed for LOS until they're truly nighlies.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MrWilsonxD:
Is there any update on this? I would like to know about this as well.. My Axon 7 is out getting repaired for a camera defect (praying they don't notice i unlocked and relocked the bootloader) and was wondering if I would be able to get wi-fi/volte calls.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Att doesn't let BYOD devices support volte so they disabled it.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MrWilsonxD:
Why does it seem that AT&T try to screw people so much? Wifi Calling was working on my 6p.. :(

So even for T-Mobile, or it's companies (Like I have mint sim with wifi/volte capabilities) won't work because it was disabled by the big wigs of lineage? That's unfortunate! :( Thanks for the response man.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Not lineage I can probably enable the config for it. But as before att doesn't allow it so I highly doubt it would work even if I did. I may have misunderstood the response from ZTE , but it does seem like BYOD don't get to support it officially or unofficially unlike tmo and vzw. With Google it's different of course they can probably get certifications ZTE can't.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MrWilsonxD:
8 is just too small of an amount..

https://goo.gl/photos/1XjfmwSZvjEL6B3y8
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ((RayDar)):
Nice pic. What launcher?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] MrWilsonxD:
Nova, it's actually a live wallpaper.

https://goo.gl/photos/y1oTQPTh5qecuy6u5

KWLP

Nova launcher.

Swift black.

Cygnus dark.

Here are my backup files.. Not flahable lol
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] bd177:
adb shell reboot disemmcwp

---------- Post added at 02:00 PM ---------- Previous post was at 01:58 PM ----------

So if you enable the config for it, T-Mobile users will have wifi calling and volte?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Yes, that's correct but the old blobs don't support wifi calling completely and with 7.1.1 blobs radio crash.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
hi all,

since the new build and the sound fix, i made a couple of calls from both sim and 2/3 i had no sound with internal speaker, works ok on external speaker.

Any idea ?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] kdp162:
I had that same issue last week.. try clean flashing.. Fixed it for me
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] thefallen924:
Hey Guys. Does anyone know how to change the heads up notification timeout. I'd like to set it to 2 seconds. I know it could probably be done via adb or something. Im aware its a feature on RR but i must flashed LOS and am pretty happy, so if someone can help me out, id really appreciate it!
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] sourbear:
Cricket (AT&T) has announced VoLTE and Wi-Fi calling is coming this year and I can't imagine they won't allow it for BYOD since that's probably a very big section of Cricket customers. So the options in LOS for us should definitely be enabled eventually.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Unjustified Dev:
Cricket doesn't get a say so in the services available. The same way att 22gb cap in congested area rolled over so does all their other service policies. It's already here several of the devices in my store have already updated to support volte.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] sourbear:
Yes, the in-call volume on speakerphone is too low and also only plays through the top speaker instead of through both speakers - unless you turn your screen off with the power button while in a speakerphone call, then turn the screen back on with the power button... then both speakers start working and the volume increases greatly to where it should be when in a call on speakerphone.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] SantiHurtado:
Thank you! This worked perfectly.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] vizzze:
exactly, also works if you just press home button and leave the call screen, volume boosts immediately
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] gpz1100:
For those that use gv, using the google voice app, when playing a voice message, audio is only piped through the speakerphone, not ear piece on RR. Does the same happen on LOS?

I'm running the 4/16 build of RR.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] lentm:
Still same here with 4/24 build, dirty flash.

If the clean flash fixes it, I will do it. :(
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] spenxer168:
My LG G pad has No service on my SIM Network

What should i do?? please help? my network provider is Globe from philippines
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] dprimic:
What is connection between this tread, LineageOS 14.1 for ZTE Axon 7, and your device, LG G Pad?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] BritSwedeGuy:
A bit of a strange problem, I wonder if anyone else has experienced it?

I have some noise cancelling headphones (Audio-Technica ATN-ANC3) - when the noise cancelling is on, the screen is on and no music is playing there's a THRUM THRUM THRUM noise; this doesn't happen on other devices or with stock-based ROMs...

---------- Post added at 10:51 AM ---------- Previous post was at 10:50 AM ----------

You should ask in the right group for a start...

https://xdaforums.com/lg-g-pad-83/help
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Super.Alberto:
ZTE A2017 to ZTE A2017U

I have the Axon 7 A2017 4GB/128GB (Chinese)

I Installed:

TWRP 3.1.0-0 for ailsa_ii

A2017X_B15_Universal_Bootloader.zip

A2017_N_Modem.zip

lineage-14.1-20170424-nightly-axon7-signed.zip

Open GApps

All seems good - thanks Unjustified Dev, DrakenFX, tdm

About Phone/Device Model has changed from "ZTE A2017" to "ZTE A2017U"

Is this normal for LineageOS + Axon 7 (any model) that the Device Model will be listed as "U"?

What have other A2017 / A2017G seen?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] BritSwedeGuy:
Applying the universal bootloader updates the model to U, necessary for LOS.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
hi all,

fully cleaned flashed, but still problem with no sound on most phone calls !

sound is ok when putting on speaker, and then turning it off, the sound works on internal speaker again.

i can provide logs if needed.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] sToRm1nG:
That is not quite true.

The model is specified in the build.prop which comes from LineageOS.

*EDIT*

I mean sure it will update the model to U but the one in the settings is coming from the build.prop. :)
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Narada2XK:
Try version 2. I keep going back to that version. LOS Sound Fix v2.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
is this this one ? https://www.androidfilehost.com/?fid=529152257862718359

no working better for me :/
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] PsychoChild:
same as well no sound on phone call
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] helpmeroot:
First off, thank you very very much to all the devs for bringing LOS with working sound to the axon7

Just did a clean flash from zte stock last night (April 24th nightly). I also had a problem with calls having no sound on the internal speaker (speaker phone works fine). If I turn the screen on and off it will shift to speaker phone by itself and then the sound would stop after a brief moment. I managed to get around this problem by disabling enhanced 4G LTE mode (is this VoLTE?) in the phone settings. normal phone calls work fine, speaker phone works fine too.

EDIT: So this problem magically decides to fix itself. I can turn on VoLTE with no problems, phone calls sound proper. I did change the preferred network type to GSM/WCDMA/LTE. It was on global before but even if i change it back to global, VoLTE works fine and phone calls are good.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Narada2XK:
Sorry to hear. Actually, since flashing the latest version of LOS and the V2 fix, I made a hands free call in the car over Bluetooth and the Google Assistant told me they're calling the person but on loudspeaker. The silly phone decided to use loudspeaker instead of continuing over Bluetooth =/
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
cant see that setting, where did you find it ? thx
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] xtermmin:
Yes, Enhanced 4G LTE Mode is for VoLTE.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] helpmeroot:
It's found in Settings/SIM cards/SIM# settings
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
no such setting here, maybe because my carriers dont support it yet.

so that not the source of my problem :/
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] dwnoel:
Hi,

+1

Just like you: no sound from the other person. Only some calls (can't find a rule). Not sure but, so far, only when I am the caller (not when I m called).

And easy workaround by pressing the loud speaker button, then one more time.

Just in case: are you with SFR carrier ?
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] ssirK:
Nope, Free and B&You
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Narada2XK:
I was wondering about these calls some of you had where you do not hear the person on the other side. I experienced this issue just the other day. I reverted to V2 audio fix when this happened. I was saying to myself that the call was taking it's sweet time to ring/connect. When I looked at the phone, the call duration timer was incrementing. I tapped on the loud speaker icon and I could hear the other side. It was at that moment, things started to make sense like why would v3 and onward make the loudspeaker "turn on" when a call connects or that one time Google Assistant decided to notify me and switch to handsfree when I made a call over the cars bluetooth set. I feels like a workaround of sorts.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] Super.Alberto:
Modem goes to error state

I initially had audio problems with audio during calls.

Only found the problem after a day or so as I don't get many phone calls.

Turned out I had a 6.0.1 Modem installed.

I installed the A2017_N_Modem.zip and the audio returned.

Unfortunately, the N modem seems to be going offline intermittently and requires disabling/enabling data to get it working again.

I have 2 SIM cards, and am using the 2nd SIM for data.

Not sure if the problem is related to 2 SIM cards - I'll do more testing with only 1 SIM.

Has anyone else experienced this problem or have a solution?

See attached screen capture.

Edit1: I have A2017 (China) 4GB/128GB with lineage-14.1-20170424-nightly-axon7-signed.zip + A2017_N_Modem.zip

Edit2: The original problematic configuration had:

SIM1: MTN

SIM2: Telkom (hand cut)

I did some limited testing (a few hours) with a different SIM2(CellC) - and this seems to work reliably.

Might be that the first SIM2(Telkom) was faulty / not aligning correctly due to being hand cut.

EDIT3: After a few days I can conclude it was a faulty SIM2 - the problem has not re-occurred since getting a new sim.
[ZTE Axon 7 ROMs, Kernels, Recoveries, & Other Deve] BritSwedeGuy:
There's lots of chatter about dual SIM issues over here...

https://community.zteusa.com/community/forums/axon

Plus I'm not even sure this ROM supports it...

https://xdaforums.com/showpost.php?p=70825353&postcount=277