I had a couple of Meshtastic devices that were presenting challenges when I tried to pair them with my phones through the Meshtastic application. It turns out that the simple solution was to flash more recent firmware to them. This might not be obvious at first given that one usually flashes the device with a phone and the problems I encountered prevented phone pairing.
When connected to a computer with a USB port, the devices can present as drives. For them to present this way, you may need to hold down a button (the exact actions, if any, may vary from one hardware model to another). One in drive mode, you can open a browser to https://flasher.meshtastic.org and do the firmware update through the browser. The page will ask you to confirm your Meshtastic model, which firmware version that you want, and which drive letter on your computer refers to the device.
After flashing the new hardware, the problems I was experiencing went away. I thought that this solution needs some elevation and visibility. If you would like to see my experience with it, here is a video below.
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