You could simply use #Sideband on your phone. #reticulum is not restricted to LoRa although designed also to work with it. If there would be a Bluetooth interface for reticulum you were able to communicate just with your phone and Sideband.

GitHub

GitHub - markqvist/Sideband: LXMF client for Android, Linux and macOS allowing you to communicate with people or LXMF-compatible systems over Reticulum networks using LoRa, Packet Radio, WiFi, I2P, or anything else Reticulum supports.

LXMF client for Android, Linux and macOS allowing you to communicate with people or LXMF-compatible systems over Reticulum networks using LoRa, Pac...