yashsingh1/xdaforums huggingface dataset:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Dhinesh1999:
Hard Bricked my phone?

---------- Post added at 09:38 AM ---------- Previous post was at 09:37 AM ----------

Same setup here

Random Freeze with Blank Screen

But some how moved into 9008 mode
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] niyonsv:
My Z2 Plus is now on last official AEX 4.6 by davidevinavil. The baseband version is 1.63821.1. I don't have any problems with VoLTE calls. Now I want to flash the new Resurrection Remix 6.0 (8.1) ROM. Can you please say which baseband should I flash before flashing RR 6.0? Or do I need to just flash the baseband or first flash any ZUI ROM?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
I dont know about the needed baseband for RR. But I suggest flashing RR and test.

The only thing that will clearly not work is offline charging. ;)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Qazishahid:
I'm on AICP 7.1 rom and baseband 1.76. I'm only installing 1.70 for VoLTE issues as everybody reports working VoLTE with BB 1.70.

My question really is that can i flash this zip without bricking my phone? Do i need to have ZUI installed?:confused:

P.S : I lost VoLTE after bootloader unlock and haven't installed any ZUI versions after installing custom rom.:rolleyes:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] aswin_a_s:
No u don't want to install any zui just flash this file in TWRP in any of custom rom and reboot
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Qazishahid:
Thanks. Will try and post the result here.:o
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] art2111:
Which one is the latest?:

Radio Modem Full Version ZUI 3.5.xxx: https://www.androidfilehost.com/?fid=890129502657583465 from [MENTION=8499818]aswin620002[/MENTION]

Radio Modem Full Version ZUI 3.5.243 ST: https://mega.nz/#!hJYGQIjB!oz4INfpmc...ZRTSrULjhcWCRg

RadioModem Full Version ZUI 3.5.261 ST: (temporary offline for investigating problems with that version)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
You can take any of the two, they will give you same experience. 3.5.261 would have been the latest, but actually this version brings up problems.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] K001droid:
Anyways guys, now Offline Charging on Oreo Roms should practically will work with all basebands be it old 1.70, indian 1.76 or the new Chinese 1.70 (oreo)

:D
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] vimad97:
Hey guys, I'm running latest Pixel Experience. I'm experiencing some signal losses, moreover I'd like to get offline charging. Here's the screen of my situation: 8.1.0, baseband 1.70xxxx and AR Beast Kernel R4. Which 'custom' baseband should I flash? Can I go back to the 'stock' one after? What are the odds of soft bricking? I have really no time for QPST, flashing again the ROM etc. etc.

Thank you!
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] adil786ali63:
Radio Modem Full Version ZUI 3.5.xxx: https://www.androidfilehost.com/?fid=890129502657583465 from [MENTION=8499818]aswin620002[/MENTION]

Radio Modem Full Version ZUI 3.5.243 ST: https://mega.nz/#!hJYGQIjB!oz4INfpmc...ZRTSrULjhcWCRg

@ weimerd .. bro.. what's the difference between these two versions? which one will be better to flash?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
I dont have a z2. Dont ask me :D

Use one of them, both should work same way ;)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] pipyakas:
Im on the latest baseband (the one from zui 3.5.243) and I still have a problem that had persisted on the phone for over a year now, which is the constant fluctuation of signal when Im using HSPA. GSM and LTE doesn't have this issue, but on HSPA this is present through out every carrier/rom. Does anyone have a solution? :crying:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
as far as I can see this is related to all users. My test result was that it seems only the displayed icon that is showing weird data but the connection was stable all the time. So it seems to be only a cosmetic problem afaik.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Heramb Gaonkar:
I faced similar problem before, but after flashing 2.0 baseband by Davide fluctuations are gone.

---------- Post added at 04:46 AM ---------- Previous post was at 04:40 AM ----------

As per my observation while traveling data wasn't working properly so i had to force it to 2g only. But flashing 2.0 baseband solved it for me and many users.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] pipyakas:
where can I get that baseband? and why is the version number so different from others?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Heramb Gaonkar:
https://dev.androidfilehost.com/?fid=673368273298948026

It is a custom baseband made by Davidevinavil thats why no. Is different from others. Its not official nor latest. But for me it solved my problems. I am on Aex 5.2 and it works perfectly there don't know about other roms. Will need to test that.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] pipyakas:
Do I need to flash the entire zip or can I extract the NON_HLOS.bin and flash via fastboot?

edit: nvm, just tried and while it seems like the signal is weaker (it reached max strength while fluctuating back then), the fluctuation is gone for now. Will test furthermore for bandwidth/latency checks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] flash123nani:
Guys iam having some issues with airtel 4g. Signal fluctuates between 4g and H+ every few seconds and download speed is too low. How to solve.?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] villadecai:
Flash vía twrp? Better Signal ?

I am also on aex 5.2 with old 1.70 baseband
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Heramb Gaonkar:
Yes flash it directly via recovery.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] elmarks:
I'm on baseband 1.53476.1 with RR-N-v5.8.2-20170131, any problemas to flash to 2.0.079 and after flash last AEX ?

Tks.

Enviado do meu Z2 Plus através do Tapatalk
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] vickydodger:
I'm on latest aex 5.2 oreo and 1.76 BB..network drops and data speed is low..which one should I flash?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] pi2612:
I am on baseband 1.6xxx, with AEX 8.1, how can i flash baseband 1.76xx ??

Also with which baseband do i get LTE, I am on Airtel 4g and the LTE doesnt seem to work, it only shows 3g.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Not_James_Bond:
There's a miju thread in Guide Section you'll find 1.76 there and as for your problem i think you'll have to flash ZUI 2.5 and then Enable VoLTE and flash any other custom rom.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] art2111:
creo que no
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
added baseband of ZUI 3.5.377.

According to several users and [MENTION=7174278]kubersharma[/MENTION] this seems to be a pretty stable version!
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] K001droid:
:highfive: :good:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sarven:
can we flash 3.5.377 baseband over 3.5.243 baseband via treble twrp?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
yes
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] chrisivanovik:
How can I know my baseband version？And whats this for？
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] mondechristo1:
Flashing the baseband don't we have to flash a rom after? I remember that, a few months ago I flash a baseband and it wiped everything. And after reboot I bricked the phone.

Thank you.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] art2111:
It looks like the baseband .zip file needs to be re-flashed each time when doing clean install.

Any way to avoid it?

Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Nordicus:
No, it's not.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] art2111:
That what was happened: I had upgraded my baseband with .zip. Yesterday I've clean installed the latest AEX 5.4 and the sound on phone calls was gone. Installed the baseband .zip again and had it back.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Nordicus:
IDK, i think this or features, or jambs of this ROM.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Marado:
What´s the best for VoLte with custom rom´s???
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] NaXal:
@ Anyone who has used both 1.76 (2.5 Indian ZUI baseband) and 1.70 (3.5 China ZUI) baseband with RIL Jio (Indian SIM)

Here is my story,

I was with ZUI 2.5.104 ST (Stock Indian ROM) so had 1.76 baseband.

I did QPST 3.5 Chinese stock ZUI and OTA till latest. Didn't like it, so I installed PE (ROM) + AR Least (kernel).

Now I see I have 1.70 baseband from the latest Chinese ZUI and facing Jio reception issue (low signal strength).

In same place same time, 1.70 seems to be giving much lower reception compare to 1.76 baseband with my phone.

Has anyone else noticed this? or may be noticed opposite of mine, like 1.70 giving better reception !!

I was with impression that 1.76 is upgraded version of 1.70 :( but later read here that 1.70 is actually higher version !! So I had plan to switch to 1.76 to check network reception quality but now holding that thought to figure out what to do !!
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ajinkyat:
Great!!! worked with pixel experience 8.1 oreo from BB 1.76 to 1.70

Great!!! worked with pixel experience 8.1 oreo from BB 1.76 to 1.70
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] trivoldus28:
Latest 1.70 baseband (from ZUI 3.5.377) works great for me on AEX5.5 in the US with TMobile. I had 1.76 before (not sure which ZUI) and it was okay, but since a move recently I wasn't getting signal in my apartment so decided to flash the latest 1.70 and I'm getting a little bit better signal now :). I also tried .2xxx baseband but it had the same signal as the 1.76.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ramadurair:
my base band is .2.0.c.1.9-00026-M8996FAAAANAZM-1 and am using AEX 5.5, in India.

Is 1.76 later than the above one?

LTE works fine and should i update?

Thanks
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] keshabghosh:
Which one is 176. Please help need twrp flashable 176 BB. I am on citrus 3.5(Android 7.1.2).
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] schmidt9090:
How can I do?

I have this baseband.. 2.0.c.19-00026-M8996FAAAANAZM-1..what can I do? Can I flash the new 3.5 baseband over this?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] itzaman7793:
I'm on latest AEX OREO Rom 8.1. The Problem I'm facing is that I can't make jio to jio calls. (VOLTE is working). But all other calls are working fine. My Baseband version is 1.76. Please help to resolve my issue.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] zZJhoNZz:
Hi guys any baseband with 3g 1700-2100 AWS? or how to add this band to phone? or the zuk z2 never will change the bands?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] JV Spartacus:
use network signal guru app
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] dm00389731:
This is the baseband version
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] JV Spartacus:
Open the app, then click on 3dots at the top right corner . Select Lock Bands , Then LTE , Then Band Frequency ( B1 is 2100mhz)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] devashish90:
Which of the basebands mentioned in the thread has the lowest Mobile Network Standby drain? This is a big issue specially for oreo users and the ones using both sim have been facing the worst battery endurance.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] vatstarun18:
hey everyone

i am on AEX 4.5 nougat

baseband 1.76 (Indian)

i am facing strange issue sim 1 calling is clear but sim2 calling is not clear,other person can't hear me properly some distorting sound

any one facing this issue please help
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] panchodmb:
can i flash it on a custom rom directly?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] saurav_k:
Any update on this? I too have a similar issue
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] vatstarun18:
You can download module "Android mic fix" in Magisk

it solves for me you can try it
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] prasuindia:
Dear Team,

During flashing custom ROM, had got my device soft bricked and then after successfully flashing firmware, unfortunately there was no IMEs available. Later, XDA threads have helped me to recover the same. But even after updating baseband to 2.0 still I'm unable get Jio signals on it.

Please help me.

Prasanth
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] dm00389731:
Where i got the baseband version 1.76 .give me the link plz if anyone have?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
1.76 is Indian baseband. It will not work with latest P Roms. You need the newer 1.70 baseband from ZUI 3.5.xxx or later for new CustomRoms.

Anyway 1.76 you will get once you flash Indian ZUI with qfil.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] 2VJ5:
1.76 works pretty well with the latest P ROM's, even with 4.4 kernel
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
collides with what devs of P and 4.4 Kernel suggests. Anyway enjoy then
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] 2VJ5:
Working without a hiccup
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] dm00389731:
Is there any twrp flashable zip file of 1.76 baseband version .... Because i am on 1.70 baseband version and my jio sim network fluctuate more and i am not getting good signal even open place. This problem occurs after flashing the 1.70 version. Plz give me the link or file of 1.76 version ..... I dont want to flash again stock rom and again unlock bootloader and flash again custom rom...
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Dexter001:
No sim detected

After doing a clean flash of the latest AEX 6.0 build (Pie based), there is no signal(3g,4g) and also error while trying to register on my network (Airtel) and the secret menu (*#*#4636#*#*) shows voice : radio off:crying:

Current baseband version is 1.76.

The IMEI is intact fyr. Which baseband should I flash so that my network comes on:confused:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] JV Spartacus:
Search for 1.70 baseband twrp version it should work
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Dexter001:
I am currently on 1.70 (pfb screenshot) baseband but still there's no sign of any network. Is there any other workaround to get my network back?:crying:
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] JV Spartacus:
I have zui firmware I'll upload baseband file as soon as I get home or find fastboot mode baseband (.bin file)

Flash that if network does not work even then

You will have to qfil stock rom
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Nordicus:
[MENTION=5664263]Dexter001[/MENTION]

try it - https://xdaforums.com/lenovo-zuk-z2/how-to/zui-oreo-firmwarebaseband-twrp-flashable-t3776254
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Dexter001:
[MENTION=6486626]JV Spartacus[/MENTION]

Thanks a lot, do let me know if in case to which stock zui along with the proper baseband should I QFIL to get back

[MENTION=2363159]Nordicus[/MENTION]

I flashed it via twrp but still no network/sim detected

Is it advisable to downgrade to Oreo with the proper baseband for solving the radio : off issue ?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] JV Spartacus:
Download latest qfil abd zui 3.5
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
added ZUI 4.0.199 baseband. All credits to [MENTION=4723116]crisps[/MENTION]
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sandruman:
Simply flash It with twrp?

Inviato dal mio Z2 Plus utilizzando Tapatalk
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
check first post. yes, flashable zip :)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] @dev:
Can it be flashed over kubersharma's 3.5.377 ?

Will not locked bootloader?

confirming
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
yes. But keep in mind I do not own a Z2 plus (running a Z2 Pro) so I cant verify by myself.

There are some guys already that tested it it telegram group and it worked.

As always: flash at your own risk. And please let us know :)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] MrTrueGame:
Guys pls HELP!

I'm out of ideas for now!

My short story:

I've got android 7.x based on LOS 14 . And all was good. Then i talk with some one it was super good voice and no screams from the street.

I've reinstalled my android to 9.x based on LOS 16. And now all people can hear themselfs better than me. It looks like there own voice translates to me and back to them.

For now I've tried all kind of modems and problem is always the same. Mb its something with settings in phone or what else could help?
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] imarco.box:
Search zero sound fix

Enviado do meu Z2 Plus através do Tapatalk
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] hamza_iraki:
please i need modem for zuk z2 rom miui 10.3
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] hamza_iraki:
please help me i have miui 10.3 installed zuk z2

i want now install the new modem for fm radio

please give me the correct modem to install with twrp
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
well... read first post. then decide to flash or not to flash.

All basebands are flashable with twrp. But carefully read first post.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] crisps:
There is no fm radio in z2
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] hamza_iraki:
i will give you the details and please give the correct modem of my version
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
i would flash latest. But I think you did not get first post.

You run 1.70 baseband atm. So every 1.70 baseband should be flashable. Use latest 4.0 baseband.

But take care, flashing baseband could end up in soft brick unless it usually works without problems.

I will not take responibility in any case, all at your risk.

Other users reported it works without problems.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] hamza_iraki:
ok i will use version 4.0.199 but after to install it i need to clean flash and cache or without it

---------- Post added at 01:16 AM ---------- Previous post was at 01:03 AM ----------

after installing the new modem fm radio not work

i use miui 10.3
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
no wipe is needed. See post 1. All written there...

what u mean with fm radio? You mean FM radio app is not working with Z2? Maybe check first if Z2 has an FM receiver built-in? Then you may have realized that there is none. So no FM for you no matter which Rom you use.

You just wasted my time I guess...
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] essuraj:
If hard bricked

turn off phone.....wait 10 sec... press vol up and down at same time.... then in a sec, plug in usb..voila ...later reflash bootloader
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] arunon2013:
Mistakenly flashed .. I didnt backup EFS backup. My volte option broken. Any idea to recover it again? please help me
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] kartik-dhiman:
On Pixel Experience latest CAF build.

My baseband ia 1.70. and signal reception is low.

Should I flash 1.76 ??
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Hemun:
1.76 is Indian Baseband and 1.70 is Chinese. They are basically same but as far as I know, 1.70 is latest (1.70 > 1.76).

Flash Version ZUI 4.0.199 ST since its the newest.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] sandruman:
I've flashed both two baseband and also the last firmware. The problem of fluctuation is only on custom rom.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ockie101:
Bad Signal and phone reboots while driving and on LTE

Hello guys. I am in South Africa. My new work phone was stolen so I dug up my old Zuk Z2. When I got the phone it was the Chinese version without Google Services. So a guy helped me flash the Indian ROM. Phone worked great and I loved it. Since I started using the phone now again recently I noticed that the signal is pretty unstable compared to other phones next to it on the same network. I also noticed that the phone would reboot constantly if it is on LTE and I am driving around. It does not happen when you put it on 3G/2G mode.

I then studied up on how to flash ROM's and so I updated the phone to Android 10 with Lineage OS 17.1 and I actually got it right. Was scared to death of doing it myself. Anyway, I hoped it would solve the issues of the unstable signal and the rebooting while on LTE and driving. It did not. The problem remains.

I have now read about baseband. Do you guys think the phone needs a new baseband version? Can I update the baseband while it is on Lineage OS? Current baseband is 1.76387.1.92759.1
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] NaXal:
Baseband alone may not solve the signal issue.

Yes, newer baseband is welcome for latest custom roms so updating it won't be a bad idea.

Beware, make sure that you have backup of your bootloader unlock image file before you proceed towards the baseband update. It may end up locking your bootloader & you may need to unlock it again for installation of custom rom or TWRP !!

However, troubleshooting the signal reception issue is a different thing.

Please note, many ROMs are known for signal drops. Some times, its just the icon which keeps dropping bars but actual network performance stays ok. Some times in some roms network icon doesn't show anything dropping but you end up losing network frequently.

If your network worked fine in same route & place with stock rom (Indian or Chinese version) but it's dropping with a perticular custom rom, then you should try another different custom rom to see the out come.

Thanks.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ockie101:
Thank you for the reply. It was already having the signal issues and rebooting while driving with LTE enabled with the stock Indian ROM, which is why I took the plunge and studied how to unlock the bootloader and load Lineage in the hopes of Lineage resolving the issue, but it remained.

Loading a different bootloader sounds like a different animal and now I am too scared to do it. I have resorted to using a very old HTC One M8 which I had lying in the drawer also and have loaded Lineage on that also. It has no signal issues and does not reboot like the Lenovo does when I am driving and have LTE enabled. Will just have to make peace with the fact I cant use my Lenovo for my daily phone :( Other than those problems, it is such a nice phone still, specially with Lineage on it now :(
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] NaXal:
Following the guide given here is relatively safe as many have done these without issue.

Chinese ZUI had latest baseband over Indian ZUI. Chinese ZUI received much higher updates over Indian version.

If your phone had LTE reception issue even with Chinese ROM you had, then it's highly unlikely that it's due to ROM rather the hardware of Z2 Plus may be week compared to that HTC you are referring too.

By the way, make sure your SIM Card is clean & placed in first SIM Slot !!

Thanks.
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] ockie101:
So just a update. I decided to put my personal sim into the same phone (I kind of forgot that this is a dual sim phone). Personal sim is in sim slot 1 and work sim is in slot 2 and it used for data and set to LTE. Slot one with my personal sim is set to 3G mode only. Since having two sims in the phone, the issue of the phone rebooting while driving and it being on LTE mode have gone. I dont know why this would have fixed the issue, but somehow it did :)
[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] Arnavsinghtanwar:
Can i flash it over over baseband version 1.6 of marshmellow?

although right now i am on MSM Xtended 11.0 rom.