Currently, I have no problem with the phone's build quality.
The menu on the console buttons and on the LCD screen is in English.
Furthermore, the main issue concerns the settings since the user instructions included in the box are printed in English.
According to Article 5b of Law 2251/1994 regarding user instructions in Greek, the merchant is obliged to provide the buyer with user instructions and settings in Greek within the product packaging.
In this case, the phone without the operational settings and user instructions in Greek makes it dysfunctional and difficult to use.

First of all, it cannot be easily supported on the wall. In order to install it and make it work properly, I needed a whole invention with old components from another phone and silicone gun gluing and screws (half an hour of work). It does not have any accessory to collect the cables behind it. In other words, for wall use, prefer something else.
I do not like the ring tones, they sound loud but "shrill".
The speakerphone does not sound as clear and I would like it to be louder.
The caller ID recognition works correctly and it also has a small history (of course without names).
For the money I paid (with shipping less than 12€) if it withstands time (4-5 years) I will be fully satisfied.
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UPDATE:
After several months, it no longer supports well on the wall. It does not work for the job I needed it for. :/