Recently my housemate and I just realized that the TIME technician installed Huawei HG8240H5 modem instead of Huawei HG8145V5 2in1 modem/router, as we registered during the online promotion 3-month ago so we suppose to get V5 version + 1 mesh router, and the technician didn't told us he gave us H5 version instead of V5 version at all during the installation.
When I emailed the customer service, she told us that because of the house layout, they have to install H5 version, doesn't make sense to me, both are modem but why cannot. Anyone having the same situation as me?

https://pictr.com/images/2021/09/17/BlMFWn.md.jpg
https://pictr.com/images/2021/09/17/BlMv1J.md.jpg

There's a panel box for internet fibre modem.

May I know the specific reasons, why?

Thanks in advance.