Environment: NS switch
problem: Japanese version, Hong Kong version cannot connect to 5G WIFI with more than 44 channels
Solution: Modify the WIFI area code of PRODINFO.dec
Background: My switch is one of the first Hong Kong versions I bought. WIFI can only connect to Japanese channels. The router at home is from China. Although it can be adjusted to channel 44, it seriously affects the 5G transmission speed of other devices.
Solution process: Use a virtual system to modify the WIFI area code of PRODINFO.dec in the Nand partition.
Article directory
1. Extract the key:
Use Lockpick_RCM to extract the switch key and export it as prod.keys. This file must be saved. If you make a nand backup, you must have this file.
2. Use virtual series:
I didn't dare to modify the real NAND. If it failed, it would become bricked, so I switched to the atmospheric virtual machine system.
The method of using the virtual system is briefly explained.
3. Modify the PRODINFO partition:
1. Open NX nand manager, import key options→configure keyset. Open Lockpick_RCM to extract prod.keys and save.
2. Click file-open on the upper left, open the virtual system 00 file on your SD card, select the prodinfo partition, right-click, encrypt&dump to extract it, and get PRODINFO.dec.
3. Use an editing tool such as HXD to open the extracted file, change 52 31 at 0x80 to 53 34 (if you guessed it correctly, this is the area code of the National Bank), and save it.
If you are running a system of 15.0 or above, modify the position of line 80 and line 200 as shown below:
- Re-open the 00 file with NxNandManager, right-click PRODINFO, click restore from file, open PRODINFO.dec (not a further .bak backup file), yes.
- Replace the 00 file to the corresponding location on the SD card and restart the search for wireless networks.
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