[Xiaomi Mi 10T / 10T Pro Questions & Answers] skyNET:
Dear forum elders, dear friends,

About 1.5 months ago I bought 1 Mi 10T, 8/128 device and until 2 days ago, the strangeness started in the device, which was working flawlessly with everything;

By the way, for 1.5 months the phone bootloader was off and I was using everything original.

When I was shopping after work, I noticed that the telephone network was gone at the grocery store I entered, there were frequent commutes, I didn't care much, but when I had a job with mobile banking, the situation got serious. My line is Pttcell, by the way ....

I asked the informal cashier friend if the operator and his phone were working, Turk Telekom and he said it works (Same infrastructure)

Then I went home and saw that the network had improved and I thought it was a temporary problem until I got back to the market place ...

Afterwards, a fire fell into me, as you know, the device is abroad, a long time passed and a sudden malfunction started ...

What is written above is the occurrence and development stages of the fault, by the way, in the device; no tumble, fall, crash, dislocation, change, dye under the skirt, etc. You know, if I drop it for once, I won't be sad ...

Then I talked to the supplier and got advice, he is a friend who does not understand much about this business, he only sells, but he said that such problems are usually software and if I open the bootloader and do a repair, the device will most likely be fixed ...

In previous tests, I found that the device had no problems with the capture, and usually stuck in band1 (2100), band3 (1800) and band7 (2600mhz). The application I use for this is "Network Cell Info Lite" and after unlock / repair it is widely used as "Network Signal Guru".

I am dealing with semi-professional repairs myself. Normally, such errors are caused by the IC called RF_Amplifier and pass as an antenna problem, the device loses the network unconditionally at all frequencies, the call is interrupted, etc. But in band 3, 1 and 7, the device has no problem, so neither draw nor break, etc. While at home, I actively use everything including VoLTE, I do not have access problems and interruptions.

When I manually switch the network to other modes Except 4G and 5G, it completely goes away. In modes such as 2G (GSM - Edge) 3G (HSDPA - WCDMA), there is no network signal on the device.

After trying with 2 more operators and clarifying the situation, I decided that there was a baseband malfunction and wanted to share the situation with you, dear Masters. If there is anything you want to ask or want me to try in detail, I look forward to your valuable help / comments and suggestions.

Transactions made so far;

Originally, 2 types of sim cards have been tried with Vodafone and Turk Telekom, both have the same symptoms (I couldn't find Turkcell, but I don't think it will change the result)

Bootloader unlocked, repaired with original QCN, repaired with Qcn taken from a different device, the result is still the same ...

The questions in my mind;

Does modem software cause such a problem?

Is there a possibility that it is from the Modem Chip?

Are there any chances of it being one of the Network Switchers (IC)?

If you encounter this kind of problem and have a solution, I expect your help, otherwise my new phone will be a very expensive tablet ...

Best regards.