In this guide, wThismguide’ll flash a modem from another region onto your Sony Xperia 1 IV/V device. The Japanese version of this device (1 V) comes with 16GB RAM, while the international variant offers only 12GB. Additional 12 GB The Japanese model allows easier bootloader unlocking than its US counterpart.
Due to these differences, many global users mainly opt to import the device from Japan, Europe, the US, and Taiwan. The import option has its drawbacks. Unlike the US version, the Japanese variant lacks support for the WiFi 6E 6GHz frequency spectrum, restricting users to the 5GHz band.
Although the 5GHz range isn’t slow, it’s unreasonable to miss out on a higher frequency when the hardware can support it (the 6E restriction is solely software-based).
For this reason, we’ve created a guide detailing how to flash a modem from another region on your Sony Xperia 1 IV/V. Follow these steps to maximize the network capabilities of your device.
How to Flash Modem of a different region on Xperia 1 IV/V
Before beginning, ensure you back up all data on your device. Remember, Droidwin and its members are not liable for any consequences that may arise from following these steps, including potential damage to your device or data loss.
Start by installing the drivers for your 1 IV | 1 V.
Next, download and install XperiFirm software on your computer.
Use this software to download your chosen region’s firmware.
Extract the downloaded firmware and move the three modem files to a new folder.
Proceed to download and install NewFlasher on your computer.
Copy the NewFlasher.exe file into the new folder that houses the three modems.
Now, boot your device into flash mode by plugging a USB into it and holding Vol Down during boot-up.
Open the CMD (Command Prompt), run newflasher.exe and initiate the flashing procedure.
Let’s assume we’ve flashed the US modem and wish to enable 5G [NR]. Here’s what you need to do next:
Open your phone dialer and dial ##4636##.
Next, navigate to Phone Information -> 3 dots in the top right -> Select Radio Band.
Choose your desired region (in our case, the US).
Update the Preferred Network Type to NR/LTE/GSM/WCDMA.
Check for NR Available True and NR State NOT_RESTRICTED.
There you have it! These are the steps to flash the modem of a different region on your Sony Xperia 1 IV/V device. If you have any questions regarding these steps, drop us a comment, and we’ll get back to you with an answer as soon as possible.