Hello guys, I want to explain my problem. I own a ZTR01 router which corresponds to the ZTE MC801A1 model. I have an issue: the original firmware was Japanese, branded by KDDI. I have installed several different firmwares, but I always end up stuck with no service on all SIM cards – not even 4G works.
Let me explain better: the SIMs are recognized, the APN is detected automatically, but the SIM is always shown as no service. I also tried changing the IMEI, but that doesn’t change anything.
Does anyone know where I can download a working QCN file for this model? I’m afraid that my QCN backup file might be corrupted. Has anyone else already experienced this same symptom? If so, how did you fix it? Thanks in advance for your help.
To explain further: I’ve already tried almost all the firmwares – both the T-Mobile one (with admin login access) and the STC (Saudi) one – but every firmware I install results in no service, even though the SIM is detected.
This my router:
https://ibb.co/4nzbTkT6