Remove all antennas from the True-D module to prevent damage to the electronics. Power Up: Power on your goggles with the True-D installed.
The V4.0 firmware brought a physical hardware change alongside software improvements, adding a graphical OSD (On-Screen Display) element. It allows pilots to view their current channel, band, and battery voltage directly inside the goggle screens without taking the headset off. The Open-Source Alternative: Achilles Firmware
We recommend this way to download app, because it has less change to your current Apple ID.
Before you update your location, you must spend your store credit, cancel your subscriptions, and get a payment method for your new country or region.
For more details, please refer this url:
https://support.apple.com/en-us/HT201389