Zenfone 3 laser lost imei and can't root

[Blissfull]

Hello everybody. My dad's laser 3 (zc551kl) suddenly lost both its imeis the other day, which makes the phone unable to join the cellular networks at all.

I have two troubles:

A) Can't root. So far I've updated to the latest version, which is WW-80.20.52.90 (Android 8.0.0) to see if the problem was resolved because I see a very old update caused this same trouble. But when I run the unlock tool on the phone, it says "An unknown error occurs, which might be a network connection issue. Please wait and try again later". The phone is connected to the wifi correctly, so my trobules begin with not being able to unlock and root.

B) Once I manage to root, and access my nvram, I have two troubles. 1) I can't find imei maker anywhere which seems to be one of two files (zip) that I think I need in order to restore my imei, is there an alternative tool/file I can user now? And most important 2) My dad can't find the phone's box and the sticker on the back, if it ever contained the imei, is long rubbed/erased by now. So I do not have the phone's original imei numbers anywhere. Is there ANY way to obtain the original numbers somewhere so that I can restore them?

Thanks for any help/feedback possible.

 

[Blissfull]

My situation changed a little, phone is found and I have the IMEIs, so now what I need to find out is:

A) Is there any way to fix asus' unlocker or an alternative to unlock and root?

B) Is there any tool like imei maker to fix this, that doesn't require a box or subscription? I don't mind doing difficult stuff, even calculating and hex editing files directly, etc.