How to relock bootloader - Moto E4 Plus Questions & Answers

Is there a way?
I also have Moto e4 plus xt1771 Nicklaus.

fastboot oem lock
Locks the device bootloader.

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I have a unlocked bootloader moto x XT1095, and after the stagefright update my phone is stuck on the "Bootloader Unlocked Warning" page.
I try to connect to the phone via fastboot but the device is not recognized.
How do I make fastboot recognize the connected deivce? Please help!!!

[HELP] FASTBOOT NOT DETECTED (Nicklaus)

Device: Moto e4 Plus
Model: XT1770 (Mediatek varient)
Type: Nicklaus
Issue: Recently i used the option “Factory reset" which caused this problem.
I had unlocked bootloader with TWRP installed.
The phone boot looped and i discovered that my bootloader was deleted by then.
I can't perform any fastboot commands unless i get back the bootloader. ...
IMPORTANT: When i access bootloader from TWRP option, it gets me into a fastboot model with saying device unlocked. ( But pc does not detect it. )
Please share a link of your Moto e4 Plus's (XT1770 Nicklaus) bootloader img and a guide of how to installed it.
Help will be appreciated.
Faq:
1.Can i still access TWRP recovery?
Yes (functional)?
2.did my pc stopped detecting device after this issue?
Yes. (Please help me)?

Motorola Moto G7 Power unlock bootloader problem

Hi, I have problem with unlock bootloader in my moto G7 power because my firmware is broke I have Unlock Code from Motorola site when use command fastboot OEM unlock #code receives a message (bootloader) Check 'Allow OEM Unlock' in Android Settings > Developer but I can't enable developer options because my firmware not work, I can only enter fastboot mode. I tried to run developer option from ADB but I have empty list devices even though I have installed drivers Android ADB Interface. I tried to install stock firmware but I need to unlock bootloader first. Does someone have an idea for this problem??

Can't unlock bootloader

I am using Moto g5s plus and I unlocked the bootloader using unlocking key. But after some time i relocked the bootloader using the cmd " fastboot oem lock". But now I want to unlock the bootloader again but it showing the error msg " invalid boot state" . I used many methods like "unlocking key" , cmd - "fastboot flashing unlock" , fastboot oem unlock" but nothing works. Please help me to unlock the bootloader. Thanks in advance.

just fastboot and the flash is locking.

The device is not starting except on Fastboot.
Flashing Locked* but the OEM was unlocked, but I forgot to activate it in the developer options.
Moto G7 Plus: XT1965-2

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