I shared this post earlier, and many friends hope to update the baseband replacement method of the new model. Let me make some supplements to it today. Due to the large cross-version of Android models. Some models may have been officially updated to Android 12, 13 and so on from the factory Android 8. So any tutorial may not be applicable to all Android versions and models. Any tutorial can learn from some of these steps to try it out on your own model. To know its principle.
The baseband partition NON-HLOS.bin of some models cannot be opened with tools for editing. But there are also multiple ways to replace and edit.
On the computer side, you can directly use 7zip decompression software to right-click to open the compressed package
You can see the complete baseband partition file. Some models before 865 can directly flash the baseband partition test or modify some partition files for testing. You can refer to the description of the first post. 875 and 8Gen1/8+ models after 865 can refer to the following instructions
You can also directly open the baseband partition file with mt on the mobile phone
8Gen1/8+ and other models can only replace the partition file at the beginning of the modem. similar
Copy about 30 files at the beginning of the modem, copy and replace them to the phone path /vendor/firmware_mnt/image/, then restart the self-test to see the effect
The main purpose of replacing the baseband is that some versions have better signals. The updated version signals differently, and then the step-by-step replacement will change
For normal baseband replacement, please follow the same version replacement. For example, Android 12 replaces Android 12. Of course, different models may also be slightly different. self test
Any modification of system partition files is risky. Before operation, please make a habit of backing up important data and partitions that need to be replaced first.