Bluetooth support is now available in KatanaMan and GT1Man, and GT1BassMan. This enables connection to the Boss device without requiring a USB connection to your phone/tablet. The connection relies on the use of a compatible MIDI/USB adapter. 

The CME WIDI Uhost product has been validated for this purpose, and for a limited time, is available at 30% off when you use the code WM30 at checkout. You can find the CME Uhost here:

https://www.cme-pro.com/product-category/ble-midi/widi-uhost/

Bluetooth support has been added to GT1000Mate enabling your android phone or tablet to connect directly to the GT-1000 without requiring a USB connection. 

In July 2022 Boss released a firmware update (Firmware Version 2.0) for the Katana MkII amp.

This firmware update adds a significant number of new features and functionality improvements to expand the amp's capabilities.

As you are probably aware, Google has released version 11 of Android - and many phones and tablets using this version are now on the market.

Android 12 introduces some further tightening of security controls - in particular those relating to access to the Bluetooth service.