@Joseph-TP Hello, the modem came back from the service and they did nothing. On top of that, the rubber feet under the modem were missing. I explained again that the problem was not fixed and even took a video and sent it to the service technician. He connected remotely and tried to solve it for 30 minutes by trying various methods but he couldn't. Finally, he told me that the head office, that is, you, do not allow software downgrades and that there is a program in between and that you do not allow to use it. He told me again to contact the head office, that is, you, what can I do in this situation? Can you help me? I cannot use the modem at all anymore.

  @Joseph-TP Yes, I am in contact with him. He said he would contact the service to help me.

  @HelenSmith8261 Thank you but the price was too high for me, my device got bricked and I can't use it for almost a month :D The lesson I learned from this is this: report the error to the software engineer but do not install the test firmware file they sent you for testing on your modem, otherwise your device may get bricked :D

@Joseph-TP I don't understand what you mean by faulty replacement. I told the software engineer about my problem and told him which firmware version had that problem. He confirmed it and sent me a firmware file to test. I don't know if there was a problem with the software file sent to me or if I was unlucky and my modem got bricked. But your technical service and software engineers said they checked and tested the firmware file sent to me and said there was no problem with the firmware file. I told you what happened next. My device was at the service for 3 weeks and they said they were waiting for your remote connection from the head office and that the device would be downgraded. I said okay and somehow the device passed the tests of the technical service and came back to me without any troubleshooting, just like I sent it to the service. When I told them they didn't fix the problem, they told me it passed their own test. The device that was waiting for you suddenly didn't wait for you and suddenly it was faulty and bricked. I don't know how it passed the tests, but this time I took video evidence. I took 3 videos and sent them to them. They connected to my computer remotely and tried to fix it for 30 minutes but it didn't work. Then the person who connected told me that I had to contact the head office and that they didn't have the authority to downgrade the software. They told me that the authority is only with the headquarters, that is, with you, and they directed me to you, but I was confused at this point. This device was already waiting for your connection before it came back to me. How could they send it to me without you connecting and fixing it? What confused me was that the rubber feet under my modem were missing. I also mentioned this to the live support section on the website and explained the situation again and stated that what was done was wrong. They asked me to send the device back to them. They received the device on Monday of this week. It has been 3 days, including Monday. It is still waiting. The registration process has been completed in the service inquiry and it says it is waiting in line for testing. I am still afraid that they will send it back without fixing the problem.