[Lenovo ZUK Z2 (Plus) Guides, News, & Discussion] weimerd:
Hi mates,

as I got a lot of requests for providing basebands for Z2 (plus) as well I will try adding them here.

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ATTENTION!

If you use encryption then dont flash any baseband as if may corrupt your encryption.

Check your current baseband version first!

Your baseband is 1.70? Great! You are on ZUI China? Happy flashing!

Your baseband is 1.76? Dont flash, you will softbrick your phone. Flash ZUI China version first.

Reason: There is a China version (baseband 1.70) and an Indian version (baseband 1.76). The provided basebands here are China versions only. Cannot be flashed on top of Indian version.

If you have ZUI Indian version installed install ZUI China first.

All flashings are on your own risk. I'm not responsible for any damage.

I don't have a Z2 (plus) so take care.

So to make it clear once and forever:

1.70

is China baseband

1.76

is India baseband

The higher version number does not say anything about it is actual newer.

ZUK decided not to change the baseband version anymore from 1.70 on. So if you want the latest baseband you have to take it out of last released ZUI.

It cannot be seen under phone info. You will always see the same number there no matter which version is installed.

Read the things above. Understand it. Don't ask me anymore to that, I'm tired of explaining always the same.

Use latest twrp official version to flash. Download it at www.twrp.me.

No wipes needed after flashing.

ZUK never changed baseband numbers but changed content anyway. Dont ask for changelog, there is none released by ZUK.

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BASEBANDS / RADIO MODEMS

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!oz4INfpmcuub7l50qGzy6W9QM9Nh3ZRTSrULjhcWCRg

Radio Modem Full Version ZUI 3.5.377 ST:

https://www.androidfilehost.com/?fid=962187416754474260 (thx to [MENTION=7174278]kubersharma[/MENTION] :)

Radio Modem Full Version ZUI 4.0.199 ST:

https://mega.nz/#!4M4HCCKR!fwXyQrX7UJhy_D4S9aI8YMWWUSdjPcqC9y6DniM2-io (thx to [MENTION=4723116]crisps[/MENTION])

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Notes

Offline Charging: If you run a CustomRom based on Android 8.1 that pretends to have offline charging you NEED a baseband of Oreo (ZUI 3.5.xxx) to make it work.

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TroubleShooting:

Problem: After reboot your phone requires your usual pin on lock screen. But even when typing correct pin it will switch back to lock screen.

Solution: Reboot to twrp.

In twrp start file explorer (find it under advanced)

In folder data/system delete all files beginning with "locksetting". Usually one to three files.

Reboot. After reboot no pin is necessary, you need to re-setup again.

Problem: I get no LTE / 4G signal anymore. HELP!

Solution: Thanks to [MENTION=4628393]vickdu31[/MENTION] and [MENTION=5686701]juyer[/MENTION] there is the following mini guide:

- VoLTE users: Backup EFS partition with twrp.

- Download 3.5 latest baseband from this post

- flash it with twrp.

- Extract .zip of baseband

- Reboot to fastboot

fastboot -i 0x2b4c flash modem NON-HLOS.bin (this file is from .zip baseband)

fastboot -i 0x2b4c erase modemst1

fastboot -i 0x2b4c erase modemst2

fastboot -i 0x2b4c reboot

LTE working instantly.

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all credits to:

[MENTION=7174278]kubersharma[/MENTION] (explanation to difference of 1.70 and 1.76

[MENTION=7979326]lixianwei1998[/MENTION] (providing 3.5.243 baseband)

Voske Koristel Lakra (providing 3.5.261 baseband with sensors)

[MENTION=7174278]kubersharma[/MENTION] (providing 3.5.377 baseband)
[MENTION=4723116]crisps[/MENTION] for providing ZUI 4.0.199 baseband

Enjoy mates :)